Patent 9280220
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Active provider: Google · gemini-2.5-pro
PTAB activity (1)
AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.
- IPR2025-01556IPRfiled Sep 17, 2025vs. SHENZHEN QIANFENYI INTELLIGENT TECHNOLOGY CO., LTD.Discretionary Denial
Cached for 24 hours. Status strings are sourced verbatim from the PTAB API; the colored badge is our heuristic classification.
Cases on file (1)
Group view →Specific litigation cases in our database that name US patent 9280220. The free-form analysis below may also discuss cases beyond this list.
- Wacom Co., Ltd. v. Shenzhen Qianfenyi Intelligent Technology Co., Ltd.filed Aug 28, 20242:24-cv-00702U.S. District Court for the Eastern District of TexasPending
Defendants: Shenzhen Qianfenyi Intelligent Technology Co., Ltd.
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Litigation Summary for U.S. Patent 9,280,220
As of April 26, 2026, U.S. Patent 9,280,220, assigned to Wacom Co., Ltd., is the subject of at least one known litigation in the United States. The details of the legal proceedings are outlined below.
District Court Litigation
A patent infringement lawsuit has been identified in the U.S. District Court for the Eastern District of Texas where Wacom Co., Ltd. is asserting its rights to U.S. Patent 9,280,220.
- Plaintiff: Wacom Co., Ltd.
- Defendant: Shenzhen Qianfenyi Intelligent Technology Co., Ltd. (also known as MAXEYE)
- Jurisdiction: U.S. District Court for the Eastern District of Texas
- Case Number: 2:24-cv-00702
- Filing Date: August 28, 2024
- Status: The case is currently pending. A claim construction hearing was held on January 28, 2026, to determine the meaning of disputed patent terms. Wacom's complaint alleges that the defendant's active stylus products infringe on seven of Wacom's patents, including the '220 patent, which is titled "Pulse- or frame-based communication using active stylus." In connection with this lawsuit, Wacom also initiated a legal action in the High Court of Karnataka in India to gather evidence from a Bengaluru-based semiconductor manufacturer that supplied components for the allegedly infringing products.
Patent Trial and Appeal Board (PTAB) Proceeding
In addition to the district court litigation, U.S. Patent 9,280,220 is also the subject of a proceeding before the Patent Trial and Appeal Board (PTAB).
- Proceeding Type: Inter Partes Review (IPR)
- Petitioner: Shenzhen Qianfenyi Intelligent Technology Co., Ltd.
- Patent Owner: Wacom Co., Ltd.
- Case Number: IPR2025-01556
- Status: An IPR has been filed by the defendant in the district court case, challenging the validity of U.S. Patent 9,280,220. The current status of the IPR proceeding is pending.
No other litigation involving U.S. Patent 9,280,220 has been identified at this time. A separate case filed by Wacom in the Northern District of Illinois, Wacom Co., Ltd. v. The Individuals, Corporations, Limited Liability Companies, Partnerships, and Unincorporated Associates Identified on Schedule A (Case No. 1:25-cv-14083), does not appear to involve the '220 patent based on available documentation.
Generated 5/13/2026, 12:47:00 PM