Patent 12131745

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. 2024-06-25 · recorded 2024-08-02 · reel 068162/0809 · Assignment of Assignors Interest

    PFEIFENBERGER, LUKAS; ZHANG, SHAWNSanas.ai Inc.

    Correspondent: BRENTON A. BUTLER · SANAS.AI INC.

    internal reorg

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

  • Lukas PFEIFENBERGER (Sanas Ai Inc)
  • Shawn Zhang (Sanas Ai Inc)

No unusual patterns noted; inventors are associated with the original assignee at the time of filing.

Original assignee

Sanas Ai Inc. is the original assignee.
Sanas.ai Inc. operates in the field of real-time accent conversion, suggesting they likely ship a product embodying the claims. Their current status appears to be operating, as indicated by their active legal status and continued involvement in patent applications.

Assignment timeline

  • 2024-06-25 (executed) / recorded 2024-08-02 — Reel 068162/0809
    • Conveyance: Assignment of Assignors Interest
    • Assignor: PFEIFENBERGER, LUKAS; ZHANG, SHAWN
    • Assignee: SANAS.AI INC.
    • Correspondent: BRENTON A. BUTLER, SANAS.AI INC., 1547 PALACE DRIVE, SAN MATEO, CA 94403
    • Context: Internal reorg (assignment from inventors to company)

Timeline diagram

timeline
    title Ownership of US 12131745
    2024 : Inventors assigned to Sanas.ai Inc.

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The assignment is from the inventors to Sanas.ai Inc., which appears to be an operating company.
  2. Known asserter in the chain — not present. Sanas.ai Inc. is not identified as a known asserter.
  3. Repeat correspondent across the chain — not present. Only one assignment is recorded for this patent, and therefore no recurrence of a correspondent.
  4. Cascading transfers — not present. Only one assignment is recorded.
  5. Pre-litigation transfer — unclear. There is a US case filed in California Northern District Court (3:25-cv-05666) related to this patent family, filed sometime in 2025. The assignment occurred in June 2024 (executed) / August 2024 (recorded). Without a precise filing date for the litigation, it is unclear if this falls within a 6-month window prior to litigation.
  6. Bankruptcy fire-sale — not present. No indication of bankruptcy.
  7. Privateering — not present. No evidence of privateering.
  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, Sanas.ai Inc., is recorded. This record does not provide sufficient information to identify any NPE or patent troll patterns. Further, while litigation exists within the patent family, the exact filing date of the litigation is needed to assess a pre-litigation transfer signal.
USPTO Assignment Center Search for US12131745

Generated 5/29/2026, 5:52:03 PM