Case: 22-1824 Document: 54 Page: 1 Filed: 09/23/2024

NOTE: This disposition is nonprecedential.

United States Court of Appeals for the Federal Circuit ______________________ QUALCOMM INCORPORATED, Appellant v. INTEL CORPORATION, Cross-Appellant ______________________ 2022-1824, 2022-1825, 2022-1826, 2022-1828, 2022-1829, 2022-1830 ______________________ Appeals from the United States Patent and Trademark Office, Patent Trial and Appeal Board in Nos. IPR2018- 01326, IPR2018-01327, IPR2018-01328, IPR2018-01329, IPR2018-01330, IPR2018-01340. ______________________ Decided: September 23, 2024 ______________________ ISRAEL SASHA MAYERGOYZ, Jones Day, Chicago, IL, ar- gued for appellant. Also represented by MARC BLACKMAN; ROBERT BREETZ, DAVID B. COCHRAN, Cleveland, OH; KELLY HOLT, New York, NY; MATTHEW JOHNSON, JOSHUA R. NIGHTINGALE, Pittsburgh, PA; JENNIFER L. SWIZE, Wash- ington, DC.

LOUIS W. TOMPROS, Wilmer Cutler Pickering Hale and Case: 22-1824 Document: 54 Page: 2 Filed: 09/23/2024

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Dorr LLP, Boston, MA, argued for cross-appellant. Also represented by DAVID LANGDON CAVANAUGH, GARY M. FOX, THOMAS SAUNDERS, TODD ZUBLER, Washington, DC; KATHRYN ZALEWSKI, Palo Alto, CA. ______________________ Before MOORE, Chief Judge, LOURIE and STARK, Circuit Judges.

STARK, Circuit Judge.

Qualcomm Incorporated (“Qualcomm”) appeals the fi- nal written decisions issued in four inter partes review (“IPR”) proceedings 1 in which the Patent Trial and Appeal Board (“Board”) found claims 1-15, 17-25, and 27-33 of U.S. Patent No. 9,608,675 (“’675 patent”) unpatentable as obvi- ous. Intel Corporation (“Intel”) cross-appeals the final written decisions in two other IPR proceedings 2 in which the Board found claims 1-3, 5, 7-15, 17-21, 23-25, and 27- of the same ’675 patent not obvious. We affirm in Qual- comm’s appeal and dismiss Intel’s cross-appeal.

I A Qualcomm owns the ’675 patent, entitled “Power Tracker for Multiple Transmit Signals Sent Simultane- ously.” The ’675 patent discloses “[t]echniques for generat- ing a power tracking supply voltage for a circuit (e.g., a power amplifier).” ’675 patent, Abstract. According to the patent, the prior art required multiple transmitters to transmit multiple signals. But “operating multiple

1 Intel Corporation, et al v. Qualcomm Incorporated, IPR2018-01326 -01327, -01329, -01340 (PTAB 2018).

2 Intel Corporation, et al v. Qualcomm Incorporated, IPR2018-01328, -01330 (PTAB 2018).

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transmitters . . . concurrently for multiple transmit sig- nals” can increase the number of circuits and, therefore, costs. Id. at 6:16-19. The ’675 patent discloses a solution to these drawbacks by transmitting multiple signals using a single power amplifier having a single power tracking supply generator. In particular, “a single PA [power am- plifier] with power tracking may be used to generate a sin- gle output RF [radio frequency] signal for multiple transmit signals being sent simultaneously” and “[a] single power supply voltage may . . . track the power of all trans- mit signals being sent simultaneously.” Id. at 6:20-25.

Independent claim 1 of the ’675 patent is illustrative: An apparatus comprising: a power tracker configured to determine a single power tracking signal based on a plurality of inphase (I) and quadrature (Q) components of a plurality of carrier aggre- gated transmit signals being sent simulta- neously, wherein the power tracker receives the plurality of I and Q compo- nents corresponding to the plurality of car- rier aggregated transmit signals and generates the single power tracking signal based on a combination of the plurality of I and Q components . . . ; a power supply generator configured to generate a single power supply voltage based on the single power tracking signal; and a power amplifier configured to receive the single power supply voltage and the plural- ity of carrier aggregated transmit signals being sent simultaneously to produce a sin- gle output radio frequency (RF) signal. Id. at 14:28-48 (emphasis added).

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B Intel petitioned for, and the Board instituted, a total of six IPRs relating to claims of Qualcomm’s ’675 patent. In attempting to prove obviousness, four of Intel’s IPR peti- tions (the “Yu IPRs”) relied on European Patent Applica- tion Publication 2,442,440 A1 (“Yu”). Yu “relates to a method of operating a control unit for controlling an oper- ation of a power amplifier (PA), wherein said power ampli- fier (PA) is configured to amplify a radio frequency, RF, signal (SRF) that is obtained from at least two input sig- nals.” J.A. 2469 (internal reference number omitted). Yu recites that its benefits include obtaining a control signal efficiently without needing a dedicated PA, by using only one transmitter and one PA. Yu specifically discloses a power amplifier that may be used in base stations or “wire- less transceivers of mobile terminals and the like.” J.A.

2472 ¶ 34.

In the other two IPRs (the “Chen IPRs”), Intel relied primarily on a prior art research paper by Wenhua Chen et al., Hybrid Envelope Tracking for Efficiency Enhancement in Concurrent Dual-Band PAs, 54 Microwave & Optical Tech. Letters 662 (Mar. 2012) (“Chen”).

In all six IPRs, the parties disputed the correct con- struction of the term “plurality of carrier aggregated trans- mit signals.” The Board construed the term as “signals for transmission of multiple carriers.” This construction dif- fered from both Qualcomm and Intel’s proposed construc- tions. Accordingly, after the Board found all challenged claims to be unpatentable, Qualcomm appealed, arguing that the Board had violated the Administrative Procedure Act, 5 U.S.C. §§ 551-559, by failing to give it notice of, and an opportunity to respond to, the Board’s construction. See Qualcomm Inc. v. Intel Corp., 6 F.4th 1256, 1262 (Fed. Cir. 2021). We agreed with Qualcomm, vacated the final writ- ten decisions, and remanded for further proceedings. See id. at 1267.

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On remand, Intel contended that the Board’s pre-ap- peal construction of the “plurality” term, “signals for trans- mission on multiple carriers,” was correct. Qualcomm countered with a construction identical to the one Intel had proposed earlier in the proceedings: “signals for transmis- sion on multiple carriers at the same time to increase the bandwidth for a user.” The Board decided that its initial construction was “overly broad.” E.g., J.A. 30. It now agreed with Qualcomm that the disputed term should be construed more narrowly to mean “signals for transmission on multiple carriers at the same time to increase the band- width for a user.” J.A. 38.

The Board further found that increasing bandwidth for a “user” does not include increasing bandwidth for a base station. J.A. 48-49. But the Board also found that even though Figures 3 and 4 of Yu were directed to base stations, “it would have been obvious” to a person of ordinary skill in the art “to take advantage of Yu’s invention in a mobile device,” and increasing bandwidth for a mobile device would be increasing bandwidth for a “user.” J.A. 48-50.

More particularly, a person of ordinary skill in the art “would have made any necessary modifications” to Yu “so that a mobile device could appropriately implement Yu’s power amplifier.” J.A. 50. The Board’s finding was based, in part, on Yu’s Figure 2, which discloses a “mobile-termi- nal-appropriate system for controlling a supply voltage of a power amplifier,” as well as Yu’s paragraph 34, which ex- pressly taught that Yu’s power amplifier may be used in base stations or “wireless transceivers of mobile terminals and the like.” J.A. 50-51 (quoting J.A. 1421); see also J.A.

49-50 (citing J.A. 2472 ¶ 34). In the Board’s view, an ordi- narily skilled artisan would have, based on these disclo- sures, been motivated to modify Yu to operate on mobile devices.

The Board concluded, therefore, that Intel had shown by a preponderance of the evidence that claims 1-5, 17-25, and 27-33 of the ’675 patent were unpatentable for Case: 22-1824 Document: 54 Page: 6 Filed: 09/23/2024

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obviousness over Yu. In the Chen IPRs, by contrast, the Board determined that Intel had not shown that Chen’s teachings could be applied to mobile devices or that it would have been obvious to modify Chen for use in a mobile device. Thus, the Board concluded that Intel had failed to show by a preponderance of the evidence that any claims of the ’675 patent were unpatentable over Chen.

Both Qualcomm and Intel timely appealed. The Board had jurisdiction under 35 U.S.C. § 316(c). We have juris- diction under 28 U.S.C. § 1295(a)(4)(A) and 35 U.S.C. §§ 141(c), 319.

II Obviousness is a question of law based on underlying findings of fact. See KSR Int’l Co. v. Teleflex Inc., 550 U.S. 398, 427 (2007). The underlying fact findings include: (1) the scope and content of the prior art; (2) differences be- tween the prior art and the claims at issue; (3) the level of ordinary skill in the pertinent art; and (4) secondary con- siderations such as commercial success, long-felt but un- solved needs, and failure of others. See Graham v. John Deere Co., 383 U.S. 1, 17-18 (1966).

We review the Board’s legal conclusion on obviousness de novo and its findings of fact for substantial evidence.

See HTC Corp. v. Cellular Commc’ns Equip., LLC, 877 F.3d 1361, 1369 (Fed. Cir. 2017). “Substantial evidence is such relevant evidence as a reasonable mind might accept as ad- equate to support a conclusion.” Intel Corp. v. PACT XPP Schweiz AG, 61 F.4th 1373, 1378 (Fed. Cir. 2023) (internal quotation marks omitted). Further, we “defer to the Board’s findings concerning the credibility of expert wit- nesses.” Yorkey v. Diab, 601 F.3d 1279, 1284 (Fed. Cir. 2010).

III Substantial evidence supports the Board’s underlying factual findings. Hence, we agree with its conclusion that Case: 22-1824 Document: 54 Page: 7 Filed: 09/23/2024

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Intel proved that the claims challenged in the Yu IPRs are unpatentable.

A The Board’s finding that a person of ordinary skill in the art would have been motivated to modify the embodi- ments of Yu’s Figures 3 and 4 is supported by substantial evidence. Yu expressly teaches, in its paragraph 34, that “[t]he power amplifier PA may e.g. be employed in wireless communications systems such as base stations of cellular communications networks or wireless transceivers of mo- bile terminals and the like.” J.A. 2472 ¶ 34 (emphasis added). Moreover, as even Qualcomm’s expert acknowl- edged, “Figure 2 of Yu discloses a mobile-terminal-appro- priate system for controlling a supply voltage of a power amplifier.” J.A. 3984 ¶ 65 (emphasis added). These ex- plicit disclosures in Yu, of its power amplifier being used in a mobile device, provide substantial evidence for the Board’s finding that a person of ordinary skill in the art would have been motivated to do just that, i.e., to use Yu’s power amplifier in a mobile device. See KSR, 550 U.S. at 417 (“[I]f a technique has been used to improve one device, and a person of ordinary skill in the art would recognize that it would improve similar devices in the same way, us- ing the technique is obvious unless its actual application is beyond his or her skill.”).

In concluding that Intel had proven the challenged claims obvious over Yu, the Board made an implicit finding that a person of ordinary skill in the art would have had a reasonable expectation of being able to successfully imple- ment Yu’s power amplifier into a mobile device. “[A]n im- plicit finding on reasonable expectation of success under such circumstances is acceptable” where, as here, the Board’s path can be reasonably discerned. Elekta Ltd. v. ZAP Surgical Sys., Inc., 81 F.4th 1368, 1376 (Fed. Cir. 2023). The Board, after pointing to Yu’s paragraph 34 and its Figures 2-4, found that a skilled artisan “would have Case: 22-1824 Document: 54 Page: 8 Filed: 09/23/2024

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made any necessary modifications so that a mobile device could appropriately implement Yu’s power amplifier.” J.A.

49-50. We can reasonably discern that the Board found – from Yu’s paragraph 34 and its Figures, as supplemented by Intel’s expert’s opinion and Qualcomm’s expert’s conces- sion – that a person of ordinary skill would have had a rea- sonable expectation of being successful in implementing Yu in a mobile device. Given Yu’s explicit teaching that one may successfully implement a power amplifier on a mobile device, the Board’s finding of reasonable expectation of suc- cess is supported by substantial evidence.

B Qualcomm faults the Board for failing to detail pre- cisely how Yu would have been modified for a mobile-device implementation. The amount of explanation the Board is required to provide to justify an obviousness determination “necessarily depends on context.” Pers. Web Techs., LLC v. Apple, Inc., 848 F.3d 987, 994 (Fed. Cir. 2017). Here, where Yu expressly teaches that power amplifiers may be em- ployed both in base stations and mobile devices, and dis- closes an actual mobile device implementation, the Board’s explanation is sufficient.

Qualcomm contends that Yu teaches away from the in- tegration of Yu into a mobile device. Qualcomm asserts that since the “desired frequency spacing . . . is compara- tively large” in Figures 3 and 4, relating to base stations, J.A. 2474 ¶ 59, the “power amplifiers that cover the band- width described with respect to Figures 3 and 4” would “necessarily be too large for use in a mobile device,” J.A.

3985 ¶¶ 67, 68. Qualcomm relatedly argues that Yu’s power amplifier could not, therefore, be physically incorpo- rated into a mobile device. None of this undermines our conclusion that the Board had substantial evidence for its findings. The Board was free to reject the opinions of Qual- comm’s expert, as it did, and to instead be persuaded by Intel’s expert and what the Board determined to be the Case: 22-1824 Document: 54 Page: 9 Filed: 09/23/2024

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teachings of Yu itself. See Velander v. Garner, 348 F.3d 1359, 1371 (Fed. Cir. 2003) (“It is within the discretion of the trier of fact to give each item of evidence such weight as it feels appropriate.”); see also Consolo v. Fed. Mar.

Comm’n, 383 U.S. 607, 620 (1966) (“[T]he possibility of drawing two inconsistent conclusions from the evidence does not prevent [a] . . . finding from being supported by substantial evidence.”). Moreover, as the Board correctly pointed out, a finding of obviousness does not require a showing that the features of one embodiment may be bodily incorporated into the structure of another. See In re Keller, 642 F.2d 413, 425 (CCPA 1981).

Qualcomm also attacks the Board’s reliance on KSR’s explanation that where “a technique has been used to im- prove one device, and a person of ordinary skill in the art would recognize that it would improve similar devices in the same way, using the technique is obvious unless its ac- tual application is beyond his or her skill.” 550 U.S. at 417.

It was no abuse of the Board’s discretion to determine that Intel sufficiently raised this theory in its petition. See J.A.

1268 n.6 (“[E]ven if Yu were directed to base stations and the claims were limited to mobile devices, it would have been obvious to a POSA to take advantage of Yu’s invention in a mobile device.”); see also Corephotonics, Ltd. v. Apple Inc., 84 F.4th 990, 1002-03 (Fed. Cir. 2023) (“We review the Board’s assessments of what has been argued to and put before it in an IPR for abuse of discretion.”). And Yu itself, as supplemented by Intel’s expert’s opinions, see J.A. 52, 2472-73, 2357, 2397 n.4, provides substantial evidence for the Board’s finding, particularly because Yu makes no dis- tinctions between implementations for mobile devices and base stations. Nor does Yu describe any of its figures as limited to specific power amplifier implementations.

Finally, Qualcomm analogizes this case to DSS Tech- nology Management, Inc. v. Apple Inc., 885 F.3d 1367, 1374 (Fed. Cir. 2018), where we faulted the Board for relying on a skilled artisan’s “ordinary creativity” to fill in a claim Case: 22-1824 Document: 54 Page: 10 Filed: 09/23/2024

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limitation that was absent from the prior art references.

Here, however, the Board did no such thing. Yu’s para- graph 34 and Figure 2 both teach that Yu could be imple- mented in mobile devices.

Accordingly, and notwithstanding Qualcomm’s cri- tiques, substantial evidence supports the Board’s findings underlying its conclusion that the claims challenged by In- tel in the four Yu IPRs are unpatentable.

C Intel made clear, in its briefing and at oral argument, that it is pressing its Chen-based cross-appeal only in the event that we do not affirm the Board’s findings of un- patentability in the Yu IPRs. Given our conclusions re- garding the Yu IPRs, and Intel’s statements to us, we decline to address Intel’s cross-appeal.

IV We have considered Qualcomm’s remaining arguments and find them unpersuasive. Hence, we affirm the Board’s final written decisions holding claims 1-15, 17-25, and 27- of the ’675 patent unpatentable as obvious. We dismiss Intel’s cross-appeal.

AFFIRMED IN PART AND DISMISSED IN PART COSTS Costs awarded to Intel.