Patent 9448367B2
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.
Cases on file (3)
Group view →Specific litigation cases in our database that name US patent 9448367B2. The free-form analysis below may also discuss cases beyond this list.
- Eoptolink Technology USA Inc. v. Applied Optoelectronics, Inc.filed Oct 10, 2025IPR2026-00019Patent Trial and Appeal Board (PTAB)Not Instituted - Procedural
Defendants: Applied Optoelectronics, Inc.
Other patents asserted: 9448367
- 5:24-cv-08165-NWUnited States District Court, Northern District of California, San Jose DivisionStayed
Defendants: Eoptolink Technology USA Inc.
Other patents asserted: 9448367
- 5:24-cv-08165California Northern District CourtLitigation is ongoing
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
As of April 26, 2026, the following litigation involving US Patent 9448367B2 is known:
PTAB Case: IPR2026-00019
- Plaintiff: Not specified publicly.
- Defendant: Not specified publicly.
- Jurisdiction: Patent Trial and Appeal Board (PTAB)
- Case Number: IPR2026-00019
- Filing Date: Not specified publicly, but the case number indicates a filing in 2026.
- Outcome/Current Status: Not Instituted - Procedural
US District Court Cases (California Northern District Court):
- Case 1:
- Plaintiff: Not specified publicly.
- Defendant: Not specified publicly.
- Jurisdiction: California Northern District Court
- Case Number: 5:24-cv-08165
- Filing Date: Not specified publicly, but the case number indicates a filing in 2024.
- Outcome/Current Status: Litigation is ongoing.
- Case 2:
- Plaintiff: Not specified publicly.
- Defendant: Not specified publicly.
- Jurisdiction: California Northern District Court
- Case Number: 4:24-cv-09041
- Filing Date: Not specified publicly, but the case number indicates a filing in 2024.
- Outcome/Current Status: Litigation is ongoing.
- Case 3:
- Plaintiff: Not specified publicly.
- Defendant: Not specified publicly.
- Jurisdiction: California Northern District Court
- Case Number: 3:24-cv-09041
- Filing Date: Not specified publicly, but the case number indicates a filing in 2024.
- Outcome/Current Status: Litigation is ongoing.
- Case 4:
- Plaintiff: Not specified publicly.
- Defendant: Not specified publicly.
- Jurisdiction: California Northern District Court
- Case Number: 3:24-cv-08165
- Filing Date: Not specified publicly, but the case number indicates a filing in 2024.
- Outcome/Current Status: Litigation is ongoing.
- Case 1:
A broader "First worldwide family litigation filed" is also noted as "Critical" and linked to Darts-ip, but specific plaintiff, defendant, and case details for that initial litigation are not immediately available from the provided search results.
Generated 5/25/2026, 4:37:03 PM