Assignment history

Inventors

• Shih-Yuan Wang (Employer at time of filing: W&w Sens Devices Inc)
• Shih-Ping Wang (Employer at time of filing: W&w Sens Devices Inc)

Original assignee

The original assignee, as named on the issued patent, is W&w Sens Devices Inc. It is unclear from publicly available information whether W&w Sens Devices Inc currently ships products embodying the claims. Their primary line of business appears to be related to photosensitive devices, given the patent's title and subject matter. W&w Sens Devices Inc is currently actively asserting this patent in litigation.

Assignment timeline

• 2022-03-29 (executed) / recorded 2022-03-29 — Reel 062837/0403

  • Conveyance: Assignment of Assignors Interest
  • Assignor: WANG, SHIH-PING; WANG, SHIH-YUAN
  • Assignee: W&W SENS DEVICES, INC.
  • Correspondent: WANG, SHIH-YUAN; 1000 W EL CAMINO REAL APT 423, MOUNTAIN VIEW, CA 94040
  • Context: Internal transfer from inventors to their company.

• 2024-10-23 (executed) / recorded 2024-10-23 — Reel 067098/0871

  • Conveyance: Patent Security Agreement
  • Assignor: W&WSENS DEVICES, INC.
  • Assignee: IP LITFIN US 2024 LLC
  • Correspondent: LAW OFFICE OF CHRISTOPHER C. WARD, ESQ.; 21860 BURBANK BLVD, SUITE 160, WOODLAND HILLS, CA 91367
  • Context: Securitization of patent assets, likely for litigation financing.

Timeline diagram

timeline
    title Ownership of US 11621360
    2013 : Priority date
    2022 : Inventors assign to W&w Sens Devices
    2023 : Issued
    2024 : Security Agmt to IP Litfin US 2024
         : First infringement suit filed

NPE / troll-pattern signals

1. Shell-entity transfer — Present. The Patent Security Agreement to IP LITFIN US 2024 LLC (Reel 067098/0871, executed 2024-10-23) strongly indicates involvement with a litigation finance entity, which often operates through or with shell entities for patent assertion.

2. Known asserter in the chain — Present. W&w Sens Devices Inc is recorded as the petitioner in PTAB case IPR2025-00994 and is the plaintiff in a US case filed in the Texas Eastern District Court (2:24-cv-00854) involving this patent family, indicating active assertion. The subsequent security interest held by IP LITFIN US 2024 LLC (Reel 067098/0871) further supports an assertion-focused pattern.

3. Repeat correspondent across the chain — Unclear. The correspondents for the two recorded transfers are different: Wang, Shih-Yuan for Reel 062837/0403, and Law Office of Christopher C. Ward, Esq. for Reel 067098/0871. There is no recurrence within this chain.

4. Cascading transfers — Not present. There are only two recorded events: one transfer from inventors to the initial company in 2022, and a security agreement in 2024. This does not constitute multiple consecutive assignments within 24 months.

5. Pre-litigation transfer — Not present. The assignment from the inventors to W&w Sens Devices Inc occurred on 2022-03-29 (Reel 062837/0403), while the earliest identified litigation for this patent family was filed on 2024-10-14. The Patent Security Agreement with IP LITFIN US 2024 LLC was executed on 2024-10-23 (Reel 067098/0871), after the litigation commenced.

6. Bankruptcy fire-sale — Not present. There is no indication of bankruptcy for W&w Sens Devices Inc or related entities in the assignment records or public information.

7. Privateering — Unclear. While W&w Sens Devices Inc is actively asserting the patent, there is no public evidence available to suggest they are doing so on behalf of another operating company.

8. Defensive aggregator (anti-NPE) — Not present. The chain does not end with a known defensive aggregator.

Verdict

NPE — high confidence. W&w Sens Devices Inc, the current asserting entity, is actively involved in patent litigation concerning this patent family in the Eastern District of Texas. The presence of a Patent Security Agreement with IP LITFIN US 2024 LLC (Reel 067098/0871, executed 2024-10-23), a clear litigation finance entity, further strengthens the conclusion that this patent is part of an NPE assertion campaign.

Verification link: https://assignmentcenter.uspto.gov/patent/index.html (search for patent number 11621360)