Patent RE45971

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. 2010-05-20 · recorded 2010-05-27 · reel 24450/0148 · Assignment

    CLARK, ANDREW C.; TOPHAM, DAVID W.SENSORTECH CORPORATION

    Correspondent: · BALLARD SPAHR

    Original assignment from inventors to the 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.

✓ Generated

Inventors

  • ANDREW C. CLARK (Greenville, SC)
  • DAVID W. TOPHAM (Greenville, SC)

No information is readily available about the inventors' employers at the time of filing or any unusual patterns of departure.

Original assignee

The original assignee on record for RE45971 is SENSORTECH CORPORATION located at 100 Industrial Drive, Greenville, South Carolina, United States 29607.

Information regarding whether SENSORTECH CORPORATION shipped a product embodying the claims, their primary line of business, or their current status (operating, acquired, dissolved, in bankruptcy) is not readily available through public search.

Assignment timeline

  • 2010-05-20 (executed) / recorded 2010-05-27 — Reel 24450/0148
    • Conveyance: ASSIGNMENT OF ASSIGNOR'S INTEREST
    • Assignor: CLARK, ANDREW C.; TOPHAM, DAVID W.
    • Assignee: SENSORTECH CORPORATION
    • Correspondent: BALLARD SPAHR LLP, 999 PEACHTREE STREET SUITE 1000 ATLANTA, GA 30309
    • Context: Original assignment from inventors to the company.

The USPTO Assignment Center only shows one record for this patent, indicating the initial assignment from the inventors to Sensortech Corporation. This suggests that the original assignee, SENSORTECH CORPORATION, still owns the patent unless there are unrecorded assignments.

Timeline diagram

timeline
    title Ownership of US RE45971
    2010 : Assigned to SENSORTECH CORPORATION
    2015 : Issued as RE45971

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole recorded assignment is from the inventors to SENSORTECH CORPORATION, which does not appear to be a shell entity based on the available information.
  2. Known asserter in the chain — not present. SENSORTECH CORPORATION is not listed as a known patent asserter.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment, so no recurrence can be observed.
  4. Cascading transfers — not present. Only one assignment is recorded.
  5. Pre-litigation transfer — unclear. No litigation data for this patent was readily available to assess this signal.
  6. Bankruptcy fire-sale — not present. No indication of bankruptcy for SENSORTECH CORPORATION was found.
  7. Privateering — not present. No evidence of privateering was found.
  8. Defensive aggregator (anti-NPE) — not present. The patent is not assigned to any known defensive aggregators.

Verdict

Insufficient data

The USPTO Assignment Center only shows the initial assignment from the inventors to SENSORTECH CORPORATION (Reel 24450/0148, recorded 2010-05-27). Without further assignment records or detailed information on SENSORTECH CORPORATION's business activities, it is not possible to confidently determine if NPE patterns are present.

For verification, you can search the USPTO Patent Assignment Search at https://assignmentcenter.uspto.gov/.

Generated 6/15/2026, 12:47:13 AM