Patent D1081032

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 024450/0148 · ASSIGNMENT OF ASSIGNOR'S INTEREST

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

    Correspondent: · BALLARD SPAHR

    Original assignment from inventors to a corporation

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

To reconstruct the full assignment record for US patent D1081032 and surface NPE/patent-troll patterns, I will use the USPTO Patent Assignment Search, Google Patents, and cross-reference with known NPE lists.

Inventors

  • Andrew C. Clark (No employer listed on available records)
  • David W. Topham (No employer listed on available records)

No unusual patterns are immediately determinable regarding inventor departure due to a lack of employer information at the time of filing and insufficient data on their subsequent career paths.

Original assignee

The original assignee on record is SENSORTECH CORPORATION.

Based on the available information, it is unclear whether SensorTech Corporation shipped a product embodying the claims of D1081032, their primary line of business, or their current status.

Assignment timeline

  • 2010-05-20 (executed) / recorded 2010-05-27 — Reel 024450/0148
    • Conveyance: ASSIGNMENT OF ASSIGNOR'S INTEREST
    • Assignor: CLARK, ANDREW C.
    • Assignor: TOPHAM, DAVID W.
    • Assignee: SENSORTECH CORPORATION
    • Correspondent: BALLARD SPAHR LLP 999 PEACHTREE STREET SUITE 1000 ATLANTA, GA 30309
    • Context: Original assignment from inventors to a corporation.

Timeline diagram

timeline
    title Ownership of US D1081032
    2010 : Assigned to SensorTech Corporation

NPE / troll-pattern signals

  1. Shell-entity transfer — unclear. There is only one assignment on record, from the inventors to SensorTech Corporation. Without further information on SensorTech Corporation's business, it's not possible to determine if it functions as a licensing-only shell entity.
  2. Known asserter in the chain — not present. SensorTech Corporation is not a known entity on public NPE lists such as those maintained by RPX or Unified Patents, based on the current available information.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment, so no recurrence of a correspondent can be observed.
  4. Cascading transfers — not present. Only one assignment is recorded for this patent.
  5. Pre-litigation transfer — unclear. There is no litigation information readily available for this patent to assess if the assignment was pre-litigation.
  6. Bankruptcy fire-sale — not present. There is no indication of SensorTech Corporation being involved in bankruptcy proceedings that led to this patent's transfer.
  7. Privateering — not present. There is no evidence of an operating company transferring this patent to an NPE for assertion against competitors.
  8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at a known defensive aggregator like RPX, AST, LOT Network, Unified Patents, or Open Invention Network.

Verdict

Insufficient data. Only one assignment from the inventors to SensorTech Corporation is recorded (Reel 024450/0148, recorded 2010-05-27). There is insufficient information to determine if SensorTech Corporation is an operating company or an NPE, and no further assignments or litigation records are immediately apparent to indicate any NPE patterns.

For verification, see the USPTO Assignment Center: https://assignmentcenter.uspto.gov/

Generated 6/15/2026, 12:45:37 AM