Patent 7629634

Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

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Ownership chain (1)

Asserters network →

Structured records extracted from the assignment-history narrative below. Each entity links to its full ownership-network profile.

  1. 2008-02-23 · reel 020549/0022 · Assignment

    TSIEH, FU-YUANFORCE MOS TECHNOLOGY CO. LTD.

    original assignment

Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

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Inventors

  • Fu-Yuan Hsieh. Employer at time of filing: FORCE MOS TECHNOLOGY Co Ltd.

Original assignee

FORCE MOS TECHNOLOGY Co Ltd. Their primary line of business is semiconductor devices, specifically trenched MOSFETs, as described in the patent. It is unclear if they shipped a product embodying the claims based solely on the patent text. Their current status is unclear based on the provided patent text and Google Patents information.

Assignment timeline

  • 2008-02-23 (executed) / recorded 2008-02-23 — Reel 020549/0022
    • Conveyance: Assignment
    • Assignor: TSIEH, FU-YUAN
    • Assignee: FORCE MOS TECHNOLOGY CO. LTD.
    • Correspondent: Not specified in the provided text.
    • Context: Original assignment from inventor to company.

The USPTO Assignment Center search (https://assignmentcenter.uspto.gov/) shows no further recorded assignments for US Patent 7629634 beyond the initial assignment from the inventor to Force MOS Technology Co. Ltd.

Timeline diagram

timeline
    title Ownership of US 7629634
    2008 : Filed by Force MOS Technology Co. Ltd.
    2009 : Issued

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole recorded assignment is from the inventor to the original assignee, an operating company.
  2. Known asserter in the chain — not present. Force MOS Technology Co. Ltd. is not listed as a known NPE.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment from the inventor, and no correspondent information is provided in the patent for this specific entry.
  4. Cascading transfers — not present. No subsequent assignments are recorded.
  5. Pre-litigation transfer — not present. No subsequent assignments are recorded.
  6. Bankruptcy fire-sale — unclear. While the current status of the original assignee is not explicitly stated as "operating," there is no evidence of a bankruptcy or associated patent sale.
  7. Privateering — not present. No evidence of transfer to an NPE for assertion.
  8. Defensive aggregator (anti-NPE) — not present. The patent is not currently assigned to a defensive aggregator.

Verdict

Insufficient data. There is only one recorded assignment, which is the initial transfer from the inventor to the original assignee, Force MOS Technology Co. Ltd. This does not provide enough information to identify any NPE or patent-troll patterns.

USPTO Assignment Center search: https://assignmentcenter.uspto.gov/

Generated 5/22/2026, 6:47:00 AM