989 F.3d 1018
Fed. Cir.2021Background
- Uniloc owns U.S. Patent No. 8,995,433 directed to an "instant voice messaging" (VoIP) system with a message database and file-attachment capability.
- Facebook filed two IPR petitions challenging various claims; Facebook later joined an earlier Apple IPR and also filed additional petitions.
- LG filed separate, substantively identical IPR petitions and sought joinder; the Board granted joinder and consolidated proceedings.
- After the Board issued a final written decision in the Apple IPR, the Board dismissed Facebook from challenging claims 1–6 and 8 as estopped under 35 U.S.C. § 315(e)(1), but found Facebook not estopped as to claim 7; the Board held LG was not estopped and proceeded.
- The Board found claims 1–12, 14–17, 25, and 26 unpatentable as obvious (primarily Zydney in view of Clark and other references).
- Uniloc appealed, raising four main issues: (1) LG estoppel/privity; (2) Facebook estoppel as to claim 7; (3) obviousness of claims 1–8 ("instant voice messaging application"); (4) obviousness of claims 9–12, 14–17, 25, 26 ("attaches ... to" limitation).
Issues
| Issue | Plaintiff's Argument (Uniloc) | Defendant's Argument (Board / Facebook / LG) | Held |
|---|---|---|---|
| Whether §314(d) bars judicial review of the Board's §315(e)(1) estoppel decision as to LG | §314(d) precludes review; or even if review exists, LG is estopped as an RPI/privy to Facebook so it cannot maintain challenges to claims 1–6 and 8 | The estoppel determination arose after institution; §314(d) does not bar review; LG filed and acted independently and is not an RPI/privy | Court: §314(d) does not preclude review here; substantial evidence supports Board's finding that LG is not an RPI/privy and is not estopped (affirmed) |
| Whether Facebook is estopped from challenging claim 7 because claim 7 depends from claim 1 (which Facebook was estopped from) | Claim 7 depends on claim 1, so estoppel as to claim 1 should bar challenge to claim 7; partial dismissal creates impermissible partial institution under SAS | §315(e)(1) estoppel applies only to claims actually addressed in the prior final written decision; claim 7 was not litigated in Apple IPR, so Facebook may challenge it | Court: §315(e)(1)'s plain text limits estoppel to claims in the prior final decision; Facebook not estopped as to claim 7; SAS inapplicable because LG preserved full adjudication of challenged claims (affirmed) |
| Whether Zydney+Clark teach the claimed "instant voice messaging application" (claims 1–8) | The references do not show Clark's message database embedded in Zydney's software agent as required by the claims | Clark teaches integrating a message database into client messaging software; expert testimony supports combining Clark into Zydney's agent | Court: Substantial evidence supports Board's finding that Clark and Zydney disclose the "instant voice messaging application" limitation (affirmed) |
| Whether Zydney discloses the "attaches one or more files to the instant voice message" limitation (claims 9, etc.) and whether Board erred in claim construction or notice | "Attaches to" requires files be appended directly to the audio file (not merely associated); Board sua sponte narrowed process and shifted burden | Board construed "instant voice message" and "attaches to" consistent with specification (association/linkages); Zydney discloses associating attachments via MIME/voice container; parties had notice and opportunity | Court: Adopted Board's construction (attachment = association/link); substantial evidence supports that Zydney discloses the limitation; no due-process or burden-shifting error (affirmed) |
Key Cases Cited
- Cuozzo Speed Techs., LLC v. Lee, 136 S. Ct. 2131 (2016) (§314(d) can bar review of certain institution-related challenges)
- SAS Institute Inc. v. Iancu, 138 S. Ct. 1348 (2018) (Board cannot issue a partial institution that forecloses a final decision on petitioned claims)
- Thryv, Inc. v. Click-To-Call Techs., LP, 140 S. Ct. 1367 (2020) (petition-timing §315(b) challenges are barred from review under §314(d))
- Credit Acceptance Corp. v. Westlake Services, 859 F.3d 1044 (Fed. Cir. 2017) (estoppel challenges in post-institution proceedings are reviewable when estoppel-triggering events arise after institution)
- Applications in Internet Time, LLC v. RPX Corp., 897 F.3d 1336 (Fed. Cir. 2018) (RPI analysis focuses on control and whether petition was filed at a party's behest)
- WesternGeco LLC v. Ion Geophysical Corp., 889 F.3d 1308 (Fed. Cir. 2018) (privity requires sufficient closeness and a full-and-fair-opportunity analysis)
- In re Gartside, 203 F.3d 1305 (Fed. Cir. 2000) (obviousness is a legal conclusion based on factual findings)
- Facebook, Inc. v. Windy City Innovations, LLC, 973 F.3d 1321 (Fed. Cir. 2020) (joinder decisions and scope-of-proceeding issues can be reviewable when made after institution)