Case: 23-1356 Document: 41 Page: 1 Filed: 12/04/2024

NOTE: This disposition is nonprecedential.

United States Court of Appeals for the Federal Circuit ______________________

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Appellant

v.

SATCO PRODUCTS, INC., Appellee ______________________

2023-1356 ______________________

Appeal from the United States Patent and Trademark Office, Patent Trial and Appeal Board in No. IPR2021- 00662. ______________________

Decided: December 4, 2024 ______________________

SHAWN G. HANSEN, Nixon Peabody LLP, Los Angeles, CA, argued for appellant. Also represented by JENNIFER HAYES, SETH D. LEVY; ANGELO CHRISTOPHER, Chicago, IL.

NICHOLAS A. BROWN, Greenberg Traurig LLP, San Francisco, CA, argued for appellee. Also represented by KATHRYN ALBANESE, SCOTT JOSEPH BORNSTEIN, BRIAN JOSEPH PREW, New York, NY; HEATH BRIGGS, Denver, CO; Case: 23-1356 Document: 41 Page: 2 Filed: 12/04/2024

2 REGENTS OF THE UNIVERSITY OF CALIFORNIA v. SATCO PRODUCTS, INC.

STEPHEN ULLMER, Portland, OR; ROBERT P. LYNN, JR., Lynn Gartner Dunne & Frigenti, LLP, Mineola, NY. ______________________

Before DYK and STOLL, Circuit Judges, and MURPHY, District Judge. 1 STOLL, Circuit Judge. Appellee Satco Products, Inc. (“Satco”) successfully pe- titioned for inter partes review (IPR) of claims 1 and 2 of U.S. Patent No. 10,644,213, owned by Appellant Regents of the University of California (the “Regents”). The Regents appeal the Patent Trial and Appeal Board’s Final Written Decision holding claims 1 and 2 unpatentable for obvious- ness under 35 U.S.C. § 103. For the reasons that follow, we affirm-in-part, vacate-in-part, and remand. BACKGROUND As the parties are familiar with the facts of this case, we recite here only those facts necessary to frame and de- cide the issues presented on appeal. I The ’213 patent, titled “Filament LED Light Bulb,” is directed to: A transparent light emitting diode (LED) [that] in- cludes a plurality of III-nitride layers, including an active region that emits light, wherein all of the layers except for the active region are transparent for an emission wavelength of the light, such that the light is extracted effectively through all of the layers and in multiple directions through the

1 Honorable John F. Murphy, District Judge, United States District Court for the Eastern District of Pennsylva- nia, sitting by designation. Case: 23-1356 Document: 41 Page: 3 Filed: 12/04/2024

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layers. Moreover, the surface of one or more of the III-nitride layers may be roughened, textured, pat- terned or shaped to enhance light extraction. U.S. Patent No. 10,644,213 Abstract. Independent claim 1 and dependent claim 2 of the ’213 patent recite the follow- ing: 1. A light bulb, comprising at least one light emit- ting device, the at least one light emitting device each further comprising: a sapphire plate, a cathode on a first end of the sap- phire plate and an anode on a second end of the sapphire plate, wherein the cathode and anode provide structural support to the sapphire plate [the “cathode/anode limitation”] and are adapted to provide an electrical connection between the light emitting device and a structure outside the light emitting device; at least one III-nitride light emitting diode (LED) comprising a sapphire growth substrate [the “sap- phire growth substrate limitation”], the sapphire growth substrate in mechanical communication with the sapphire plate, and the LED and sap- phire plate configured to extract light emitted by the LED through the sapphire plate; and a molding comprising a phosphor and surrounding the LED, the molding configured to extract light from both a front side of the light emitting device and a back side of the light emitting device. 2. The light bulb of claim 1, wherein the sapphire growth substrate is a patterned sapphire substrate (PSS). ’213 patent cols. 21–22 (insertions and emphasis added to highlight disputed limitations). Case: 23-1356 Document: 41 Page: 4 Filed: 12/04/2024

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II In its Final Written Decision, the Board concluded that Satco showed by preponderant evidence that “claims 1 and 2 of the ’213 patent would have been obvious, respec- tively, over the combined disclosures of Yamazaki and Schubert, and the combined disclosures of Yamazaki, Schubert, and Tadamoto.” J.A. 24. Yamazaki is a Japanese patent publication titled “Sem- iconductor Light-Emitting Device.” J.A. 36; J.A. 1132. Schubert (or “Schubert-2003”) is a book published in 2003 titled “Light-Emitting Diodes” and authored by Dr. E. Fred Schubert, the Regents’ expert. J.A. 37; J.A. 1139. Tada- tomo is an article titled “High Output Power Near-Ultravi- olet and Violet Light-Emitting Diodes Fabricated on Patterned Sapphire Substrates Using Metalorganic Vapor Phase Epitaxy.” J.A. 38; J.A. 1508. In post-Institution briefing, the parties disagreed over whether the term “phosphor,” as recited in the final limita- tion of claim 1 above, includes “fluorescent material.” J.A. 25. In its Petition, Satco asserted that Yamazaki dis- closes the claim 1 limitation “a molding comprising a phos- phor,” explaining that Yamazaki uses the word “phosphor” when discussing the transparent resin of the light-emitting device. The Regents responded that the official translation of Yamazaki does not use the word “phosphor” and instead uses the words “fluorescent material.” Satco replied, con- ceding that the quotation of Yamazaki in its Petition was an inadvertent error, and that it was from “a version of Yamazaki that was produced in related [International Trade Commission] cases.” J.A. 27 (quoting J.A. 695). The Board ultimately construed “phosphor” to include “fluores- cent material.” The object of the invention disclosed in Yamazaki “is to provide a semiconductor light-emitting device that emits light in a plurality of directions through a simple struc- ture.” J.A. 1132. Figure 1 of Yamazaki, described as a Case: 23-1356 Document: 41 Page: 5 Filed: 12/04/2024

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“schematic cross-sectional drawing depicting one embodi- ment of a semiconductor light-emitting device according to the present invention,” J.A. 1136, is relevant on appeal:

J.A. 1137, Fig. 1. “The chip substrate 11 is structured as a flat chip substrate . . . and an electrically conductive pat- tern 11a is provided on the surface thereof.” J.A. 1135 ¶ 26. Relying on Figure 1, the Board found that Yamazaki teaches the cathode/anode limitation of claim 1. The Board observed that, in Yamazaki’s Figure 1, “the lines depicting [elements] 11a are bolded—the only bolded feature shown in any of the four figures of Yamazaki—in such a way as to appear to emphasize the wrap-around nature of the pat- tern.” J.A. 42. The Board did “not agree with [the Regents] that Figures 2 and 3 would lead a person of ordinary skill in the art to ignore the plain disclosure of Figure 1.” Id. The Board acknowledged that “Yamazaki’s figures do not define the precise proportions of the elements” but none- theless “note[d] that Yamazaki emphasizes elements 11a in bold, indicating the elements’ thickness relative to other portions of Figure 1.” J.A. 45. Because, as the Board ex- plained, “Figure 1 emphasizes the thickness of element 11a in relation to chip 11,” the Board found, inter alia, that “a person of ordinary skill in the art would have understood Yamazaki to teach the use of relatively thick j-lead metal leads that provided structural support.” Id. Case: 23-1356 Document: 41 Page: 6 Filed: 12/04/2024

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The Board also determined that Satco “establishe[d] by a preponderance of the evidence that an ordinarily skilled artisan would have found the sapphire growth substrate [limitation] obvious in light of Yamazaki’s disclosure.” J.A. 48–49. The Board explained that because Satco “cites Schubert to provide evidence of what a person of ordinary skill in the art would understand Yamazaki’s disclosure to teach,” J.A. 50—that “conventional blue LEDs were III-nitride-based LEDs that commonly included sapphire growth substrates,” J.A. 49 (quoting J.A. 257–58)— Satco did not need to “demonstrate a sufficient motivation to combine the two references.” J.A. 50 (quoting Realtime Data, LLC v. Iancu, 912 F.3d 1368, 1372–73 (Fed. Cir. 2019)). With respect to claim 2, the Board found that “the com- bination of Yamazaki, Schubert, and Tadatomo teaches each limitation . . . and that an ordinarily skilled artisan would have had reasons, with rational underpinning, to combine the references, and the skilled artisan would have had a reasonable expectation of success.” J.A. 54. In its Final Written Decision, the Board also denied the Regents’ motion to exclude certain portions of Dr. Schu- bert’s testimony under Federal Rule of Evidence 611(b), which provides that “[c]ross-examination should not go be- yond the subject matter of the direct examination and mat- ters affecting the witness’s credibility.” The Regents appeal. We have jurisdiction pursuant to 28 U.S.C. § 1295(a)(4)(A). DISCUSSION Our court reviews “the Board’s obviousness determina- tion de novo, but its factual findings for substantial evi- dence.” Volvo Penta of the Americas, LLC v. Brunswick Corp., 81 F.4th 1202, 1208 (Fed. Cir. 2023). “The substan- tial evidence standard asks ‘whether a reasonable fact finder could have arrived at the agency’s decision,’ and Case: 23-1356 Document: 41 Page: 7 Filed: 12/04/2024

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‘involves examination of the record as a whole, taking into account evidence that both justifies and detracts from an agency’s decision.’” TQ Delta, LLC v. Cisco Sys., Inc., 942 F.3d 1352, 1358 (Fed. Cir. 2019) (quoting In re Gart- side, 203 F.3d 1305, 1312 (Fed. Cir. 2000)). What a refer- ence teaches is a question of fact. TriMed, Inc. v. Stryker Corp., 608 F.3d 1333, 1341 (Fed. Cir. 2010). We review whether an agency action complied with the Administra- tive Procedure Act, 5 U.S.C. § 551 et seq., de novo. Pfizer Inc. v. Sanofi Pasteur Inc., 94 F.4th 1341, 1353 (Fed. Cir. 2024). “Claim construction is ultimately a question of law, decided de novo on review . . . [b]ut we review any underly- ing fact findings about extrinsic evidence . . . for substan- tial-evidence support when the appeal comes from the Board.” Intel Corp. v. Qualcomm Inc., 21 F.4th 801, 808 (Fed. Cir. 2021). Finally, we review “evidentiary rulings under the abuse of discretion standard.” Bosch Auto. Serv. Sols., LLC v. Matal, 878 F.3d 1027, 1037 (Fed. Cir. 2017). I We begin with the Regents’ argument that the Board erroneously found that Yamazaki discloses the cathode/an- ode limitation based on its purported teaching “of relatively thick j-lead metal leads.” Appellant’s Br. 38 (emphasis omitted) (quoting J.A. 45). For the following reasons, we agree with the Regents in this respect. As noted above, in reaching its fact finding about whether Yamazaki discloses the cathode/anode limitation, the Board agreed with Satco that element 11a represents a j-lead supporting the substrate rather than deposit- ing/etching, as urged by the Regents. Specifically, the Board explained that “Figure 1 emphasizes the thickness of element 11a” in “bold,” and thus “a person of ordinary skill in the art would have understood Yamazaki to teach the use of relatively thick j-lead metal leads that provided structural support.” J.A. 45. The Board accordingly re- jected the Regents’ argument that the electrically Case: 23-1356 Document: 41 Page: 8 Filed: 12/04/2024

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conductive patterns 11a would have been understood by a person of ordinary skill in the art to have been deposited or etched. As we have previously explained, patent drawings may be useful in shedding light about the general shapes and relative sizes of elements of the claimed invention, as well as their spatial relations to one another. See, e.g., Synop- sys, Inc. v. ATopTech, Inc., 685 F. App’x 951, 954 (Fed. Cir. 2017) (discussing the layout of elements in a patent draw- ing); Monterey Rsch., LLC v. STMicroelectronics, Inc., Nos. 2022-1411 & -1770, 2023 WL 7037383, at *3 (Fed. Cir. Oct. 26, 2023) (finding no error in Board’s reli- ance on patent drawings for the “general shapes of the claimed active regions”). It is “well established,” however, “that patent drawings do not define the precise proportions of the elements and may not be relied on to show particular sizes if the specification is completely silent on the issue.” Hockerson-Halberstadt, Inc. v. Avia Grp. Int’l, Inc., 222 F.3d 951, 956 (Fed. Cir. 2000). In other words, “figures in a patent are not drawn to scale unless otherwise indi- cated.” Id. “[A]rguments based on drawings not explicitly made to scale in issued patents” are thus “unavailing.” Nystrom v. TREX Co., 424 F.3d 1136, 1149 (Fed. Cir. 2005). Here, nothing in the Yamazaki reference indicates that its figures are drawn to scale. See J.A. 1132–37. We think that this is not a case in which the boldness of certain lines can be read as disclosing relative thickness, since the figures could just as well demonstrate only the existence of a separate structure. See, e.g., Prima Tek II, LLC v. Polypap, SARL, 412 F.3d 1284, 1290 (Fed. Cir. 2005) (discussing structural features disclosed by patent drawing). There is other evidence as well that the bolded lines do not show relative proportions. As shown above, Yamazaki’s Figure 1 depicts conductive pattern 11a as having the same or similar thickness as adhesive layer 11b. The specification describes adhesive layer 11b in Figure 1 as follows: Case: 23-1356 Document: 41 Page: 9 Filed: 12/04/2024

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[A]fter a transparent adhesive agent [11b] is coated in the vicinity of the center of the chip mounting region 11c of the surface of the chip sub- strate 11, the light-emitting chip 12 is placed on the chip mounting region 11c. Given this, the light- emitting chip 12 is pressed against the surface of the chip substrate 11, to cause the transparent ad- hesive to be pushed out and spread thinly . . . . J.A. 1135 ¶ 31 (emphasis added); see J.A. 1135 ¶ 26. That the drawing of conductive pattern 11a has approximately the same thickness as a thinly spread transparent adhe- sive 11b reinforces that Figure 1 is not drawn to scale. Dr. Schubert explained, unrebutted, that “[i]n real applica- tions,” the “adhesive between the LED chip and supporting substrate would be approximately 1 micron to 10 microns thick.” J.A. 9781 ¶ 181. Logically, Yamazaki’s figures are drawn to illustrate the LED semiconductor chip’s layers and their arrangement. If they were drawn to scale and disclosed relative proportions, one would hardly be able to see at least some of the layers. Satco provides no response to this point on appeal. The Board’s improper reliance on the figures is not nec- essarily fatal to its ultimate conclusion that Figure 1 shows j-leads, not depositing/etching. We acknowledge, as the Board did, that Satco and its expert Dr. Russell Dupuis re- lied on additional facts to support a finding that Yama- zaki’s element 11a provides structural support. See J.A. 39. Dr. Dupuis testified that “F[igure] 1 of Yamazaki depicts metallic portions that are thick in relation to the plate, cover portions of the top and bottom of the plate, and wrap around opposite edges, all of which show that the leads provide structural support to the plate.” J.A. 6663– 64 ¶ 246. We cannot, however, separate out the Board’s reliance on what it perceived as “elements’ [11a] thickness relative to other portions of Figure 1” from its finding re- garding element 11a’s provision of structural support. J.A. 45. Indeed, the Board seems to have relied primarily Case: 23-1356 Document: 41 Page: 10 Filed: 12/04/2024

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on the thickness of the bold lines depicting elements 11a in Figure 1 to find that “a person of ordinary skill in the art would have understood Yamazaki to teach the use of rela- tively thick j-lead metal leads that provided structural sup- port.” Id. Under our court’s precedent, because Yamazaki is not drawn to scale and does not show relative propor- tions, the Board erred by relying on the bold lines in Fig- ure 1 to make findings regarding the thickness of (and thus the structural support provided by) element 11a. For the reasons explained above, we vacate the Board’s decision with respect to the cathode/anode limitation and remand for the Board to assess whether Yamazaki teaches the cathode/anode limitation of claim 1 without reliance on the relative thickness of the bolded lines in Yamazaki’s Fig- ure 1. II Having addressed independent claim 1’s cathode/an- ode limitation, we now turn to the other issues raised by the Regents, including claim 1’s limitation containing the term “phosphor,” claim 1’s sapphire growth substrate limi- tation, and dependent claim 2. The Regents argue that the Board erred in finding that Yamazaki teaches claim 1’s limitation containing the term “phosphor” because: (1) it improperly allowed new argu- ment and evidence in Satco’s reply, (2) its sua sponte con- struction of “phosphor” is improper and not supported by substantial evidence, and (3) it improperly refused to ex- clude impermissible cross-examination testimony. None of these arguments persuades us. First, we agree with the Board that Satco’s reply concerning the translation of Yamazaki was responsive to the Regents’ arguments and thus properly considered under Board’s rules. Second, the Regents had multiple opportunities to discuss whether the ordinary meaning of “phosphor” includes “fluorescent ma- terial,” and substantial evidence in the form of prior art pa- tents supports the Board’s fact finding regarding the Case: 23-1356 Document: 41 Page: 11 Filed: 12/04/2024

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ordinary meaning of “phosphor” at the time of the inven- tion. As such, we agree with the Board’s analysis and adopt its construction of “phosphor.” Third, the expert tes- timony that the Regents sought to exclude was properly within the scope of cross-examination because it had a suf- ficient underlying basis in the direct testimony provided in the witness’s declaration. Turning to the next limitation at issue, the Regents ar- gue that the Board erred in finding that Yamazaki teaches claim 1’s sapphire growth substrate limitation be- cause: (1) Schubert-2003 does not disclose the use of III- nitride based LEDs including sapphire growth substrates, and (2) Satco expressly relied on Schubert-2003 as teach- ing the sapphire growth substrate limitation and thus Satco needed to demonstrate a sufficient motivation to combine the two references. Again, we are unpersuaded. First, Dr. Dupuis testified that “III-nitride LEDs are often described . . . by referring to the semiconductor layers of the LED . . . such as ‘GaN’ [(gallium nitride)],” J.A. 6587 ¶ 83, and Schubert-2003 explains, among other things, that the “first GaN” LED, which emitted light in the ultra- violet and blue spectral range, “was grown on a sapphire substrate.” J.A. 1164; J.A. 1314 (describing sapphire sub- strate as “commonly used”). Second, the Board was correct in stating that Satco relied on “Schubert to provide evi- dence of what a person of ordinary skill in the art would understand Yamazaki’s disclosure to teach,” not as a sec- ondary reference relied on for a proposed modification of Yamazaki. J.A. 50. We need not reach the Regents’ final argument that the Board erred in finding dependent claim 2 obvious over Yamazaki, Schubert, and Tadatomo because we vacate and remand the Board’s decision with respect to the cath- ode/anode limitation, which is incorporated into dependent claim 2. Case: 23-1356 Document: 41 Page: 12 Filed: 12/04/2024

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CONCLUSION For the foregoing reasons, we conclude that the Board erred in relying on the relative thickness of conductive pat- tern 11a in Yamazaki’s Figure 1 to find that Yamazaki teaches the cathode/anode limitation of claim 1 of the ’213 patent. We conclude that the Board did not err in its analysis of claim 1’s limitation containing the term “phos- phor” or claim 1’s sapphire growth substrate limitation. We thus affirm-in-part, vacate-in-part, and remand. AFFIRMED-IN-PART, VACATED-IN-PART, AND REMANDED COSTS No costs.