Patent RE42534

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.; TOPHAM, DAVID W.SENSORTECH CORPORATION

    Correspondent: · BALLARD SPAHR

    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.

✓ Generated

Inventors

  • Andrew C. Clark (Employer: Sensortech Corporation)
  • David W. Topham (Employer: Sensortech Corporation)

No unusual patterns were determinable from the available information.

Original assignee

Sensortech Corporation is the original assignee named on the issued patent. Sensortech Corporation's primary line of business appears to be the development and manufacture of moisture measurement and control systems, as indicated by their website and general business presence. It is unclear if they shipped a product embodying the claims of RE42534, as specific product details tied to this particular patent are not readily available in public searches. Sensortech Corporation appears to be an operating company and is currently active.

Assignment timeline

There is one recorded assignment for US patent RE42534 on the USPTO Assignment Center.

  • 2010-05-20 (executed) / recorded 2010-05-27 — Reel 024450/0148
    • 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 the inventors to their employer.

Timeline diagram

timeline
    title Ownership of US RE42534
    2010 : Assigned to Sensortech Corp
    2011 : Issued

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole assignment is from the inventors to Sensortech Corporation, an operating company.
  2. Known asserter in the chain — not present. Sensortech Corporation is not identified as a known asserter by RPX or Unified Patents.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment in the chain, so no recurrence can be observed.
  4. Cascading transfers — not present. There is only one recorded assignment.
  5. Pre-litigation transfer — unclear. There is no publicly available litigation history for RE42534.
  6. Bankruptcy fire-sale — not present. No indication of bankruptcy for Sensortech Corporation.
  7. Privateering — not present. No evidence of privateering.
  8. Defensive aggregator (anti-NPE) — not present. The patent is currently assigned to Sensortech Corporation, not a defensive aggregator.

Verdict

Insufficient data. There is only one recorded assignment, which is the initial transfer from the inventors to their operating company employer, Sensortech Corporation. There are no further transfers or indications of assertion activity to suggest an NPE pattern. The current owner is the original operating company.

Generated 6/26/2026, 12:45:31 AM