942 F.3d 1343
Fed. Cir.2019Background
- The ’243 patent claims an online-game system where a player-character ("pilot") and an associated virtual object ("unit") interoperate; a "sync point" ratio governs how changes in pilot ability change unit ability.
- GAT sued Wargaming and Wargaming.net for infringement in July 2015; process server returned a UK service (Dec 2015) but the copy of the summons lacked the clerk’s signature and court seal; GAT also mailed a copy to Cyprus.
- Wargaming’s counsel emailed (Feb 11, 2016) that they "will waive service" in exchange for more time to respond, but no formal waiver was filed; Wargaming later appeared and moved to dismiss for improper venue or failure to state a claim.
- Wargaming filed an IPR petition on March 13, 2017 asserting it had not been properly served and thus was not barred by 35 U.S.C. § 315(b) (one-year time bar).
- The PTAB instituted the IPR while developing the record, then in its final written decision held neither the UK nor Cyprus attempts satisfied Rule 4 service requirements and found claims 1–7 obvious over Levine + the Dungeons & Dragons Player’s Handbook; GAT appealed.
- The Federal Circuit affirmed: it agreed the PTAB’s obviousness finding was supported by substantial evidence; it also rejected GAT’s preserved and unpreserved time-bar arguments (finding several waived) and noted but excused a PTAB misstatement about its authority to decide service.
Issues
| Issue | Plaintiff's Argument (GAT) | Defendant's Argument (Wargaming) | Held |
|---|---|---|---|
| Whether IPR was time-barred under 35 U.S.C. § 315(b) because petitioner was served >1 year before filing | UK process server effected service in Dec 2015; Cyprus mailing also effective; counsel’s Feb 11 email waived defenses to service | Service was not proper under Rule 4: UK summons lacked clerk signature/seal; Cyprus mailing lacked signed receipt and clerk transmission; no formal waiver filed | PTAB correctly found service attempts insufficient and § 315(b) not triggered; FC affirms. GAT’s alternative waiver and related arguments were not preserved and are waived. |
| Whether PTAB erred in concluding it lacked authority to judge propriety of district-court service | PTAB should have decided time-bar before institution; if service occurred, IPR should not have been instituted | PTAB relied on Rule 4 to analyze service and developed the record; institution while resolving factual disputes was not prejudicial | FC agreed PTAB’s categorical claim that it lacked authority was incorrect, but found no reversible error given preserved issues and lack of prejudice. |
| Whether claims 1–7 are obvious over Levine and D&D Handbook | D&D is a dice-game manual and does not disclose computerized claim elements; claim terms ("unit","pilot","ability") require narrower constructions inconsistent with D&D | Patent definitions support broader constructions; Levine supplies online-game/datastore elements; D&D discloses familiar hit-points and hit-point ratios analogous to sync-point/ability | Substantial evidence supports PTAB’s claim constructions and its obviousness finding based on combining Levine and D&D; FC affirms. |
Key Cases Cited
- Click-To-Call Techs., LP v. Ingenio, Inc., 899 F.3d 1321 (Fed. Cir. 2018) (interpreting the statutory phrase "served with a complaint" and directing use of Rule 4/common-law sources)
- Wi‑Fi One, LLC v. Broadcom Corp., 878 F.3d 1364 (Fed. Cir. 2018) (Federal Circuit jurisdiction to review PTAB time-bar determinations)
- Worlds, Inc. v. Bungie, Inc., 903 F.3d 1237 (Fed. Cir. 2018) (burden on IPR petitioner to show petition is not time-barred under § 315(b))
- Cuozzo Speed Techs., LLC v. Lee, 136 S. Ct. 2131 (U.S. 2016) (PTAB institution errors do not automatically require vacatur absent prejudice)
- Teva Pharm. USA, Inc. v. Sandoz, Inc., 135 S. Ct. 831 (U.S. 2015) (standard of review for claim construction: de novo review of legal questions with subsidiary factual findings reviewed for substantial evidence)