delivered the opinion of the court.

This is a suit of equity, brought by the Yale Lock Manufacturing Company, a Connecticut corporation, against Thomas L. James, to recover for the alleged infringement of .reissued letters-patent' No. 8783, granted to the plaintiff, as assignee óf S. N.- Brooks, administrator of L. Yale, Jr., deceased, July 1, 1879, for an “improvement in post-office boxes,” on an application for a reissue filed May 23, 1879, (the origi-nal patent, No. 119,212, having been granted* to Silas N. Brooks, administrator of- Yale, September 19, 1871,. on an application filed September 30, 1868; and having been reissued to said Brooks, as administrator, July 9, 1872, as No. 4963, on an application for reissue filed May 7, 1872 ; and having been again, “reissued to said Brooks, as administrator, April' 24, 1877, as No. 7625, on an application for reissue filed April 19, 1875). The Circuit Court" dismissed the bill, and the plaintiff has appealed from its decree.

Among other defences, the answer sets up that each of the three reissues was not for the samé invention as the original patent, but contained material new matter, and was therefore invalid

Eeissue No. 8783 was the subject of a suit in equity, brought in the Circuit Court of the United States for the District of Connecticut, by the present plaintiff, against the- Scovill *452 Manufacturing Company, in which Judge Shipman; in June, 1880, gave a decree for the plaintiff as to the first and second, claims of the patent. 18 Blatchford, 248.

The original patent contained the following description of the invention: “ This invention relates to an improvement in the construction of the fronts of post-office boxes, and consists in making said fronts, including the doors and box frames, of metal, a/nd in securing the frames to the wooden pigeon holes by rivets cownectmg the frames with each other at top, bottom, and sides. The body of these boxes is to be made of wood, in the usual manner, namely, a series of pigeon holes, but the front of the box and the door frame are made of iron or other suitable metal. Each door frame or box front is so made that it aids in covering the edge of the wooden partition or pigeon holes, and is connected with the other frames above, below, and on'.'éach side of it in such manner that the frames make a continuous frontage, no part of which can be removed (from the outside) without pulling down other parts and breakimg the woodwork, so that a surreptitious removal of the front of o/ny box, in order to get possession of its contents, is practically impossible. . Each frame; made, as before stated, of metal, has all around it a flange, a a, which protects the outside of the wood-work. The sides of the 'frame b b, enter and fit closely against the wood forming the pigeon holes, and may be continuous or notched out at intervals; and each frame has attached to it one leaf of two or moi’e hinges, c c. The door is of iron, solid at top, where the lock d is attached, and having an opening, e, below, in which a plate of glass is secured. I prefer to locate rods f f behind the plate, to prevent the introduction of a hand if the glass bo^broken, and so to form the door that, when shut, it enters within the frame, (see g g,) so that it cannot be lifted from its hinges. When the frames are all in place, each frame is riveted through the wood-work to its four neighbors^ (see h h, Fig. 2,) and thus a continuous iron frontage is formed. Each door has a small spring bolt, i, and a lock, d, attached to'it, the two operating together and forming, in the hands of the postmaster, a perfect safeguard against all entrance to the box by means of the key, as is more partic *453 nlarly set forth in my application for‘a patent therefor, made equal date with this.” ,

That patent had two claims, as follows: “ 1. The combination of several box frames with each other and with pigeon holes, as described, by means of rivets passing through the frames, and the wood-work entering between the said frames, the combination being substantially as described. 2. The above, in combination with the flanges, making part of the frames and protecting and inclosing the exterior of the woodwork, substantially as set forth.”

The first reissue, No. 4963, contained the following description of the invention: “ This invention relates to an improvement in the fronts of post-office boxes, and consists in making said fronts, including the doors and box frames, of metal, said box frames being constructed so as to overlap and cover, in whole or in part, the front edges of the wooden pigeon holes to which they a/re affixed. The body of the boxes is to be made of wood in the usual manner, viz., a series of pigeon holes, but the front of the box and the door frame are made of iron or other suitable metal. Each door frame or box front is so made that it aids in covering the edge of the wooden partition or pigeon holes, and is connected with the other frames above,- below, and on each side of it in such manner that the frames will make a continuous frontage, no part of which- can be removed from the outside without pulling down other parts. Each frame, made, as before stated, of metal, has all around: it a flange, a .a, which protects the outside or edges of the woodwork. The sides of the frame b b enter and fit closely against-the wood forming the pigeon holes, and may be continuous or notched out at intervals; and each frame has attached to it one leaf of two or more hinges, c c. The door map be of any desirable metal, solid where the lock d is attached, and having an opening, e, below, in which a plate of gla^s is secured. I prefer to locate rods ff behind the plate, to prevent the introduction of a hand if the glass be broken. The door is so constructed that, when shut, it enters within the frame, so that it cannot be lifted from its hinges. When the frames are all in ■place, each frame is riveted through the wood-work to its four *454 neighbors, (sée h h; Fig. 2,) and in this way forms a continuous metal frontage. The door for edoh frame. has a small spring bolt,' i, and a lock,- d, attached to it, the two operating together and forming, in the hands of the postmaster,- a perfect' safe-' guard against all entrance to the box by means of the key, as is more particularly set forth in letters-patent gramted to me on the %J¡th day of October, 1871, and numbered MO,177.”

That reissue contained two claims, as follows: “ 1. The combination- of several box frames with each other and with' pigeon holes, as' described, by means of rivets passing through the frames, and the wood-work entering between the said frames, the combination being substantially as described. 2. The combi/nation of two or more metallic frames amd doors mid locks with pigeon holes, said frames homing flanges, which protect and unclose wholly or in part the front edges of said pigeon Lies”

In order to a comparison of the specification and claims of the first reissue with the specification and claims of the original patent, the parts of each which aré not found in the other are above put in.italics.

The specification and claims of reissue No. 8783 are 'as follows : “ This' invention consists in an improvement in the construction of post-office boxes, and its chief feature is -the combination of a tier of pigeon holes made of wood with a continuous frontage of metal, such frontage-consisting of doors and their frames, whieh latter cover the ends of the boards' which form the pigeon .holes. ' A. series of wooden pigeon holes, open at -the rear, and covered at the front, or on the outside by a permanent glass front, is very old, and such a series was used for post-office boxés, and in hotels as a receptacle for keys, cards, letters, &c. There has also been in use a series of wooden pigeon holes, each provided at one end with a door, as described in the patent granted to Jacob Beidler, May 28, 1866; but in this patent the door is described us hinged to the wood, and the construction is consequently inse-‘ cure, as an ordinary pocket knife or small chisel will,, even in inexperienced hands, suffice to cut away the wood or pry off ■the door; so that the boxes may be entered. Pigeon holes *455 made of iron or other metal are; difficult to construct and very costly; but such pigeon holes, each provided with an ordinary metal door, would be sufficiently secure. Such a degree of security at a comparatively low cost is attained by covering the front of a series of wooden pigeon holes with a continuous metallic frontage, that is, a frontage which presents a continuous surface of metal, or, in other' words, a surface which covers the ends of the wooden pigeon holes in such manner that those portions of the wood to which the metallic frames are attached cannot be attacked when the doors marking part of the frontage are closed. In constructing Yale’s invention the body of the boxes or the series of pigeon holes is to be made of wood in any usual manner, and the fronts thereof, viz. the doors and their frames, are to be made of iron or other suitable metal. Each door frame is of such size that it aids in covering the ends of the wooden partitions that form the pigeon holes to which it is applied, and these frames (see Eig. 1) are of such size and shape, that, where a series of them are combined with a series of pigeon holes, they cover the whole of the ends of the wood. Each door frame is a plate of metal, a a, which, when in place, overlaps a part of the ends of the wood-work surrounding the pigeon hole, the outside of the frame inclosing a greater area than the orifice of the pigeon hold, and each frame has an ear, 1> i, which enters the pigeon hole; but this ear may. be either continuous or notched out at intervals. The door is of iron or other metal, solid at top and having an opening, e, below, in which a plate- of glass is secured, and is hinged to the frame as at o c. It is preferable to locate rods f f behind the plate, so as to prevent the introduction of á hand if the glass be broken, and so to form and hinge the door that, when shut, it enters within the frame, so that it cannot be lifted from its hinges when shut. When the frames are all in place, each frame is riveted or bolted to the woodwork, to fasten it thereto, and is also riveted or bolted to its four neighbors, to secure the frames to each other. (See h h, Eig. 2.) Thus each frame is secured to the Avood-work, so that it cannot be removed till the rivet or the wood-work is cut away or broken. When all the frames are in place, a continu *456 ons metallic frontage protecting tbe wood-work is presented upon the outside Of the series of boxes, that is, the side-where the public can approach the boxes. Each door has a lock attached to it, the bolt of which is actuated through the intervention of an arm, 7c, in the manner and for the purposes set forth in a patent granted for the invention of Linus Tale, Jr., on the 24th day of October, 1871, No. 120,177. An iron door in an iron frame is not claimed as of Tale’s invention, as such doors have been used in safe vaults and for furnaces.

“What is claimed as the invention of said Linus Tale, Jr., deceased, is, 1. The combination, substantially as specified, of a series of metallic door frames and doors with a series of wooden pigeon holes, whereby a series of post-office boxes-with a continuous metallic frontage is formed. '2. The combination, substantially as described, of a series of wooden pigeon holes with a series of metallic door frames and doors, and with rivets or bolts which attach the frames, to the woodwork, whereby a continuous metallic frontage secured to the wood-work of pigeon holes is obtained. 3. The combination, substantially as described, of a series of wooden pigeon holes with a series of metallic door frames and doors, and with rivets or bolts which- attach the frames both to the wood-work and to each other, the combination being substantially such as described. 4. The combination of a- metallic door with a glass panel and with a frame to which the door is hinged, said frame being so constructed as to cover a part of the ends of the wooden partitions forming pigeon holes, and being applied thereto, the combination- being -substantially as specified. 5. The combination of a post-office box or pigeon hole, open at the rear, with a metallic frame and door to protect the front end,of it.”

Claims 4 and 5 were disclaimed by the plaintiff November ■ 29th, 1880.

Claim 1 of the first reissue was the same as claim 1 .of the original patent, while claim 2 of the first reissue was in these words: “ 2. The combination of two or more metallic frames and doors and. locks with pigeon holes, said frames having flanges, which protect and inclose wholly or in part the front edges of said pigeon holes.”

*457 In the opinion of the Circuit Court in the present case, 22 Blatchford, 294, Judge Shipman says: “ The defendant, as postmaster in the-city of New York, and not otherwise, used in the post office, provided and equipped for him by the United States government, wooden post-office boxes, with metallic fronts and doors and open at the rear. They were manufactured by the Johnson Notary Lock Company. The doors and door frames made a continuous metallic frontage. The door frames were secured to each other and to the woodwork as follows: At about the middle of each vertical edge of each door frame there was a triangular hole, which, with the corresponding hole in the adjoining door frame, made a rectangular hole, through which the metal fastening bolt, completely filling such hole, was passed, the heads of such bolts overlapping the contiguous edges-' of adjoining metallic fronts, and the bolt itself passing through the wooden partition between the adjoining pigeon holes, and being secured at the back thereof, within the post-office room, by a nut screwed upon the end of the bolt. There were other boxes constructed substantially as above described, excepting that themetal front of each pigeon hole was fastened to the wood-work by means of flanges and. screws, but the screws which attached the frames to the wood-work did not attach the frames to each other. Neither series of boxes would have infringed either claim of the original patent. . Each series infringes the 1st and 2d claims of the present reissue, unless these claims are to receive a construction which shall compel- the 'metallic frontage to be made continuous by rivets, bolts, or fastenings which shall attach the frames both to the wood-work and to each adjoining frame. The plaintiff insists that these claims should not receive such a construction, because it has been found that the invention of the specification of the reissue, although a broader one than was described in the original patent, is the invention which the history of the art and the patent show should have been described, and because the first reissue was promptly applied for, and, as issued, included in-its second claim, in the view of the plaintiff, the same invention which is described in the 1st and 2d claims of the reissue.. The defendant *458 says, among other things, that, since the case of Miller v. Brass Co., 104 U. S. 350, and James v. Campbell, 104 U. S. 356, it has been' settled by the Supreme Court, that the Commissioner of Patents, in allowing the 1st and 2d claims, exceeded his jurisdiction, because the invention which was first applied for and was ‘complete in itself,’ was clearly, specifically, and fully described in the original specification and in the claim, and an expanded claim would necessarily include an invention which was not sought to be described in the original patent; and, furthermore, that there could have been no inadvertence or mistake, because the original patent, and the accompanying documents show that the patentee ‘ did not intend it ’ (the patent) ‘to embrace any such broac. invention’ as was described in' the reissue. The defendant also • says, that the patentee, in his application for the first reissue, ineffectually endeavored to alter the description of the invention, so as to omit the fastening of the door frames to each other as a necessary integral part of the invention, and that the second claim of the first reissue cannot fairly be construed to permit such omission, and, therefore, that the patentee is estopped from insisting upon a broad construction of the 1st and 2d claims of the present reissue, and that these claims are objectionable on account of the laches of the patentee. The ‘ file wrapper and contents ’ of the first reissue were not a part of the record in the Scovill case.”

In order to show the changes made in the specification and claims of the first reissue, as they passed through the Patent Office, the specification and claims of that reissue as granted, and the specification and claims of the same as applied for, are' here placed in parallel columns, .the parts of the latter which are not contained in the- former being in italics and brackets, and being numbered severally from 1 to 8 :

As Applied, For.

“This invention relates to an improvement in the fronts of post-office boxes, and 'consists in making said fronts, *459 including the doors and box frames, of metal, said box frames being constructed so as to overlap and cover, in whole or in part, the front edges of the wooden pigeon holes to which they are affixed p and in securing said frames to sand pigeon holes by rivets or screws]. The body of the boxes is to be made of wood in the usual manner, viz., a series of pigeon holes, but the front .of the box and the door frame are made of iron or other suitable metal. Each door frame or box front is so made that it aids in covering the edge of the wooden partition or pigeon holes and ÍB

P may be] connected with A - the other frames above, below, and on each side of it in such manner that the . frames will make a continuous frontage, no part of which can be removed from the outside without pulling down other parts, p or the several frames ma/y be secured or otherwise fastened directly to the wooden pigeon holes, each one independent of the other, if' desvred.] -Each frame made, as before-stated, of metal, has all .around it a flange, a a, which protects the outside or *460 edges of-the wood-work. The sides' of' the frame- b b enter and fit closely against the wood forming the pigeon holes, and may be continuous or notched out at intervals, and each frame has attached to it one. leaf of two or more hinges, c c. The door may be of any desirable metal, solid where the lock d is attached, and having an opening; e, below, in which a plate of glass is secured. [4 Oast with the door and over the opening e for glass may be a network or ornamental open work, admitting light, and at the same time preventing the introduction of a 'hand if the glass be broken, or rods f f may be located behind the plate for the same purpose^ The ■ door is so constructed, that,, when shut, it enters within the frame, [s see g y,] so that it cannot be lifted from its hinges. When the frames are all in place, each is frame- [6 may be\ riveted A through the wood-work to its four neighbors, (see h h, Fig. 2,) and in this.way form a continuous metal frontage, [r or each sepárate frame may be screwed or otherwise fastened to the woodwork iride *461 pendent of its neighboring frames.’} The door for each frame has a small spring- holt, i, and a lock, ¿i, attached to it, the two operating together, and forming, in the. hands of the postmaster, a perfect safeguard against all entrance to the box by means of the key,, as is more particularly set forth in letters-patent granted to me on the 24th day of October, 1871, and numbered 120,177.

“ What I claim as .the invention ' of • the said Linus - Yale, Jr., deceased, is, First. The . combination of several box frames with each other/ and with pigeon holes, as described, by means of rivets passing through the frames and the wood-work entering between the said frames, the combination being substantially as described. Second. The combination of two or more metallic frames and' doors and locks with pigeon holes, said frames having flanges, which protect and enclose, wholly or in part, the front edges of said pigeon holes. ' [8 Third. The com-, bination of. several metallic box frames with each other omd with pigeon holes-, sand box frames being secured to

*462 said, pigeon holes independently of each other, by means of screws or other similar fastening, as described.] ”

*458 As Granted.

“This invention relates to an improvement in the fronts of post-office boxes, and consists in making said fronts, *459 including the doors and box frames, of metal, said box frames being constructed so as to overlap and cover, in whole or in part, the front edges of the wooden pigeon holes to which they are affixed. The body of the boxes is to be made of wood in the usual manner, viz., .a series of pigeon holes, but the front of the box and the door frame are made of iron or other suitable metal. Each door frame or box front is so made that it aids in covering the edge of the wooden partition or pigeon holes, and is connected with the other frames above, below, and on each side of it in such manfler that the frames will make a continuous frontage, no part of which can be removed from the outside without pulling down . other parts. - Each frame made,.as before stated, of metal, has all -around it a-flange, a a, which protects the outside or edges of the* wood-work.. The sides of the frame b b enter árid fit closely against the wood forming the pigeon holes, and may be continuous of notched 'out at intervals, and each frame has attached to it one leaf of two or more hinges, c c. The door *460 may be of any desirable métal, solid where the lock d is attached, and-having an opening, e, below, in which a plate of glass is secured. I prefer to locate rods ff behind the plate, to ■ prevent the introduction-of a hand if the, glass be broken. ■ The door is so constructed, that, when shut, it enters within the frame, so that it cannot be lifted from its hinges. When the frames are all in place, each frame is riveted through the woodwork to its four neighbors, (see h h, Fig. 2,) and in this way forms a continuous metal frontage. The door for each frame has a small spring bolt, i, and a lock, d, attached to it, the two operating together, and forming, in., the hands of the postmaster, a perfect safeguard against all entrance to the box by means of the key, as is more particularly' set forth in letters-patent granted to me on the 24th day of October, 1871, and numbered 120,177. ■

*461 “What I claim as the invention of the said Linus Yale, Jr., deceased, is, 1. The combination, of several box frames with each other and with pigeon holes, as described, by means of rivéts ■passing through the frames and the wood-work 'entering between .the said frames, the combination being substantially as described. 2. The combination of two or more metallic frames and doors and locks with pigeon holes, said frames having flanges, which protect and enclose, wholly or in part, the front edges of said pigeon holes.”

*462 - On the 8th of May, 1872, the Patent Office examiner called the attention of the applicant to the fact that the following '-^natters in the new specification were not warranted- by the original patent, namely-: the words “ or screws,” in the part marked “ 1,” the words “ may be,” in the parts marked “ 2 ” and “ 6,” the parts marked “ 3,” “ 4,” and “ 7,” and the third claim being the part marked “ 8.”

On the 9th of May, >1872, the applicant appealed to the Commissioner of Patents in person, because the examiner had refused to examine the case on its merits, In view of the introduction of such new matter; but, on the next day, the applicant virtually withdrew his appeal, by amending his application as follows: Míe erased part “ 1; ” he erased the words “may .be,” in parts “2”’and “6,” and substituted in each case thé word “is;” he erased parts “3” and “4” and substituted for the latter the words, “I prefer to locate rods f f behind the plate to prevent the introduction of a hand if the glass be broken.” He also erased part “ 7,” and claim 3, part “ 8,” and submitted the case for further action.

The application was then reconsidered, and' twice rejected, and from the second rejection the applicant appealed to the examiners-in-chief, who -reversed the decision of the examiner, and the reissue was granted, July 9, 1872.

In view of these facts, Judge Shipman, in his decision in the present case, said: “ It is unquestionable that the patentee, when he made his original application, intended to say that his invention did not consist simply in making, by his combination of metallic doors, door frames, and wooden, boxes, a continuous metallic frontage, 'but that it also consisted in the way in which the frontage was made continuous, viz. by the connection of the adjoining frames with each other. His defi-. nite and exact specification shows that, he supposed that his patentable invention was thus limited. ‘ He described with precision and clearness, that his. metallic frontage was to be *463 sq constructed that the frames were to be fastened to each ot-her-at-top, bottom, and sides, and not merely to the woodwork. ‘ A specific invention, complete in itself,’ was described, ‘fully and clearly, without ambiguity or- obscurity.’ Under .the definitions which are given in the decisions which have been referred to, and in Manufacturing Co. v. Ladd, 102 U. S. 408, of the inadvertence, accident, or- mistake which permits a reissue, when a patent is said to be inoperative on account of a defect or insufficiency in the specification, which arose through such inadvertence or mistake, and also of the nature'of the defectiveness or insufficiency which is meant by the statute, there was no mistake, although the patentee might have fallen into an error of judgment,- or into an erroneous conclusion of fact; and, furthermore, the original patent, according to the definitions contained in the recent, and, perhaps, in the earlier cases, was not defective nor insufficient, either in its descriptive portion or in its claims. The second claim of the first reissue,- construed. in the light of the contemporaneous facts which are shown in the ‘ file wrapper and content's,’ cannot be fairly construed to mean a metallic frontage irrespective of the fastening of the frames to each other through the .-wood-work. Were this claim to be construed without study of the history of the-application as it made its way through the Patent Office, and of the amendments which it was compelled to undergo, it would probably receive the -construction which naturally belongs to the first claim of the present reissue. But the patentee abandoned, under pressure from the -Patent Office, the clauses in the application which made the fastening of the frames to each other to. be optional, and abandoned also a proposed third claim, which described the box frames as secured to the pigeon holes ‘ independently of each other, by means of screws or other similar fastening.’ In view of the fact that the Patent Office excluded from the descriptive past of the specification suggestions of any other method.of fastening than that by which the frames were to be fastened to each other, it would be singular if the.intent of the Office was to include' in the second claim such other method of construction. If this claim has properly, and the *464 applicant knew that it was intended to have, a narrow construction— and of this knowiedgeT think there can be little doubt — the plaintiff would, not insist that the 1st and 2d claims of the present reissue ought, in view of the decision in Miller v. Brass Co., supra to be so construed as to be any broader than the 3d claim, which requires the combination of door frames, doors, and pigeon holes to be by means of rivets or bolts which attach the frames both to. the wood-work and to each other.”

It was held that there was no infringement, and, on that ground, the bill was dismissed.

"We concur in these views of the Circuit Court, and in the result which it reached. In view of the numerous recent decisions of this court on the subject of reissued patents, it would serve no good purposp to expand or amplify the views so well expressed by the judge at circuit. They are supported by the decisions in Miller v. Brass Co., 104 U. S. 350; Mahn v. Harwood, 112 U. S. 354; Parker & Whipple Co. v. Yale Clock Co., 123 U. S. 87; Matthews v. Iron Clad Mfg. Co.. 123 U. S. 347.

Our conclusion makes it unnecessary to consider the defence raised in the answer, and urged in argument, that the post-office boxes used by the defendant were used by him as postmaster of the United States at the city of New York; that the boxes were the property of the United States and' .were rented by it to sundry persons; that the rent was a part of the postal revenue of the United States and was not a source of personal emolument to the defendant; that it was not within the power of the defendant to remove or alter the boxes; and that the use of such boxes at the post office, while the defend-ant was postmaster, was not an infringement of the patent by him and did not make him liable to this suit.

Decree affirmed.