Keasbey v. Philip Carey Mfg. Co.
Opinion of the Court
This is a motion for an injunction, pendente lite to restrain defendants from making or selling certain nonconducting coverings or jackets, composed of a major portion of carbonate of or calcined magnesia and asbestos. The motion is based on three grounds: First, that the defendants’ product infringes United States patent No. 345,843, July 20, 1886, to H. M. Hanmore and others, now owned by complainant; second, that defendants in selling such product designate the same as 85 per cent, magnesia, which is alleged to be unfair competition; and, third, that defendants have cut or reduced the market price for such magnesia covering, and have thus unfairly broken in and trenched upon the plaintiff’s business.
The third of these propositions is an entirely novel one, and the argument advanced in its support is unpersuasive. A manufacturer may certainly sell his product at any prices he chooses, unless he has voluntarily, for a valuable consideration, contracted with some one else not to do so.
As to the second ground the evidence leaves little doubt that defendants’ product is substantially 85 per cent, magnesia. If they have the right to manufacture such product, they have also the right to sell under such truthful description, even though the complainant describes its product in the same way.
The essential question in the case is whether the patent is valid. There is great conflict in the affidavits, expert and other, — sharp dispute as to fairness of certain samples introduced to show prior art, and the patent has not been adjudicated. Nevertheless the weight of evidence seems to sustain the proposition that complainant has enjoyed a monopoly of the manufacture of this particular magnesia jacket for some 14 years; and if this were because the public during that period acquiesced in the validity of the patent, it might be sufficient ground for granting the motion. Proof of acquiescence, however, should be very clear to warrant the issuance of a preliminary injunction where there is a serious dispute as to validity. There should be acquiescence “under such circumstances as to induce a
Case-law data current through December 31, 2025. Source: CourtListener bulk data.