Patent 12433239

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. 2023-12-21 · reel 065936/0546 · ASSIGNMENT OF ASSIGNORS INTEREST

    TANG, TIEQIANGPETPIVOT INC, OREGON

    Correspondent: LI, JIN

    Original assignment from inventor 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.

✓ Generated

Inventors

  • Tieqiang Tang (PetPivot Inc.)

Original assignee

The original assignee, PetPivot Inc., is listed as the current assignee. No information is available within the patent text or its metadata to determine if PetPivot Inc. ships a product embodying the claims, their primary line of business, or their current operating status.

Assignment timeline

The USPTO Patent Assignment Search at https://assignmentcenter.uspto.gov/ shows one record for US12433239.

  • 2023-12-21 (executed) / recorded 2023-12-21 — Reel 065936/0546
    • Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST
    • Assignor: TANG, TIEQIANG
    • Assignee: PETPIVOT INC, OREGON
    • Correspondent: LI, JIN, SUITE 803, BLOCK A, WENSHING PLAZA, NO. 136, TAZIHU EAST ROAD, JIANGHAN DISTRICT, WUHAN, HUBEI, CHINA.
    • Context: Original assignment from inventor to company.

Timeline diagram

timeline
    title Ownership of US 12433239
    2023 : Filed by PetPivot Inc
    2023 : Assigned to PetPivot Inc
    2025 : Issued

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole assignment is from the inventor to PetPivot Inc., which appears to be the operating company.
  2. Known asserter in the chain — not present. PetPivot Inc. is not on public NPE lists.
  3. Repeat correspondent across the chain — not present. Only one assignment is recorded, so no recurrence can be observed.
  4. Cascading transfers — not present. Only one assignment is recorded.
  5. Pre-litigation transfer — not present. There is no known litigation for this patent as of 2026-04-26.
  6. Bankruptcy fire-sale — not present. No indication of bankruptcy for PetPivot Inc.
  7. Privateering — not present. No evidence to suggest this pattern.
  8. Defensive aggregator (anti-NPE) — not present. The patent is currently assigned to PetPivot Inc.

Verdict

Insufficient data. The only recorded assignment is from the inventor, Tieqiang Tang, to PetPivot Inc. on 2023-12-21 (Reel 065936/0546). This does not provide enough information to identify any NPE or patent-troll patterns.

Verification: https://assignmentcenter.uspto.gov/patent/index.html

Generated 7/7/2026, 6:01:52 AM