Patent 9423424

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. 2013-12-30 · recorded 2014-01-13 · reel 031951/0164 · Assignment

    FAN, HORNG-KUANG; HSU, HSIEN-TAMPI CORPORATION

    Correspondent: Patent Attorney

    Original assignment from inventors to company

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

  • Hsien-Ta HSU (MPI Corp)
  • Horng-Kuang Fan (MPI Corp)

Original assignee

The original assignee is MPI Corp. Based on the patent's description, which focuses on probe modules for vertical probe cards used in semiconductor testing, MPI Corp's primary line of business appears to be in the field of semiconductor test equipment. MPI Corp is currently operating.

Assignment timeline

  • 2013-12-30 (executed) / recorded 2014-01-13 — Reel 031951/0164
    • Conveyance: Assignment
    • Assignor: FAN, HORNG-KUANG; HSU, HSIEN-TA
    • Assignee: MPI CORPORATION
    • Correspondent: Patent Attorney, 7F-1, No.33, Sec. 1, Minquan E. Rd., Taipei, Taiwan
    • Context: Original assignment from inventors to company

Timeline diagram

timeline
    title Ownership of US 9423424
    2014 : Assigned to MPI CORPORATION
    2016 : Issued to MPI CORPORATION

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole assignment is from the individual inventors to MPI Corporation, which appears to be an operating company.
  2. Known asserter in the chain — not present. MPI Corporation is not identified as a known NPE.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment for this patent.
  4. Cascading transfers — not present. There is only one recorded assignment for this patent.
  5. Pre-litigation transfer — not present. No litigation has been identified for this patent.
  6. Bankruptcy fire-sale — not present. There is no indication that MPI Corp has filed for bankruptcy.
  7. Privateering — not present. There is no evidence to suggest a privateering arrangement.
  8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at a defensive aggregator.

Verdict

Insufficient data. Only one assignment from the inventors to the original assignee, MPI Corporation, is recorded. There are no subsequent assignments to indicate a transfer to a licensing entity or any other NPE patterns. Therefore, there is insufficient data to determine if this patent is currently held by an NPE.

USPTO Assignment Center search page: https://assignmentcenter.uspto.gov/patent/index.html?cn=[9423424](/patent/9423424)

Generated 5/31/2026, 6:47:07 AM