Patent 12297278

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.

Active provider: Google · gemini-2.5-flash

Ownership chain (2)

Asserters network →

Structured records extracted from the assignment-history narrative below. Each entity links to its full ownership-network profile.

  1. 2023-10-11 · reel 005995/0369 · Assignment

    LAI, Kuo-Pao, BARIBAULT, HELENE, SATO, AARON KEN, XIE, Liqin, YUAN, Tom Zhiye, JANDA, Claudia Yvonne, BREZSKI, RANDALL J., FOWLER, Tristan William, LI, YANG, LU, Chenggang, YEH, WEN-CHENSURROZEN, INC.

    Correspondent: Matthew J. Van Eman · Wilson Sonsini Goodrich & Rosati

    Internal transfer from individual inventors to the corporate entity

  2. 2023-10-11 · reel 005995/0370 · Change of Name

    SURROZEN, INC.Surrozen Operating, Inc.

    Correspondent: Matthew J. Van Eman · Wilson Sonsini Goodrich & Rosati

    Change of name only

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

  • Yang Li (Surrozen Operating Inc)
  • Tom Zhiye YUAN (Surrozen Operating Inc)
  • Aaron Ken Sato (Surrozen Operating Inc)
  • Wen-Chen YEH (Surrozen Operating Inc)
  • Claudia Yvonne Janda (Surrozen Operating Inc)
  • Tristan William FOWLER (Surrozen Operating Inc)
  • Helene Baribault (Surrozen Operating Inc)
  • Kuo-Pao LAI (Surrozen Operating Inc)
  • Liqin XIE (Surrozen Operating Inc)
  • Randall J. Brezski (Surrozen Operating Inc)
  • Chenggang LU (Surrozen Operating Inc)

Original assignee

Surrozen Operating Inc. is a biotechnology company focused on developing regenerative medicines, particularly for Wnt signaling pathways. Their primary line of business involves discovering and developing drug candidates to stimulate tissue repair and regeneration. Surrozen Operating Inc. is currently operating.

Assignment timeline

  • 2023-10-11 (executed) / recorded 2023-10-11 — Reel 005995/0369

    • Conveyance: Assignment
    • Assignor: LAI, Kuo-Pao, BARIBAULT, HELENE, SATO, AARON KEN, XIE, Liqin, YUAN, Tom Zhiye, JANDA, Claudia Yvonne, BREZSKI, RANDALL J., FOWLER, Tristan William, LI, YANG, LU, Chenggang, YEH, WEN-CHEN
    • Assignee: SURROZEN, INC.
    • Correspondent: Matthew J. Van Eman, Wilson Sonsini Goodrich & Rosati, P.C., 650 Page Mill Road, Palo Alto, CA 94304. This correspondent appears multiple times in this chain.
    • Context: Internal transfer from individual inventors to the corporate entity.

  • 2023-10-11 (executed) / recorded 2023-10-11 — Reel 005995/0370

    • Conveyance: Change of Name
    • Assignor: SURROZEN, INC.
    • Assignee: Surrozen Operating, Inc.
    • Correspondent: Matthew J. Van Eman, Wilson Sonsini Goodrich & Rosati, P.C., 650 Page Mill Road, Palo Alto, CA 94304. This correspondent appears multiple times in this chain.
    • Context: Change of name only

Timeline diagram

timeline
    title Ownership of US 12297278
    2023 : Assigned to Surrozen Inc
         : Name changed to Surrozen Operating Inc

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The transfers involve Surrozen, Inc. and Surrozen Operating, Inc., which appear to be the same operating company with a name change.
  2. Known asserter in the chain — not present. Neither Surrozen, Inc. nor Surrozen Operating, Inc. appear on common NPE lists.
  3. Repeat correspondent across the chain — present. Matthew J. Van Eman of Wilson Sonsini Goodrich & Rosati, P.C. is listed as the correspondent for both recorded assignments (Reel 005995/0369 and Reel 005995/0370). While this firm represents both operating companies and NPEs, its repeated appearance for related transfers within the same company chain is noted.
  4. Cascading transfers — not present. There are only two transfers recorded on the same day, which appear to be related to initial assignment and a name change, not a series of rapid, chained transfers to different entities.
  5. Pre-litigation transfer — unclear. The publication date of the patent is May 13, 2025. There are no current records of litigation found in Google Patents, and the assignment was recorded prior to the patent's publication.
  6. Bankruptcy fire-sale — not present. No indication of bankruptcy for Surrozen, Inc. or Surrozen Operating, Inc.
  7. Privateering — not present. There is no information to suggest privateering.
  8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at a known defensive aggregator.

Verdict

Insufficient data. The assignment records primarily reflect the initial assignment from inventors to the company and a subsequent name change. There are no indications of transfers to shell entities or known NPEs, nor are there any clear signals of pre-litigation transfers or bankruptcy sales.

USPTO Assignment Center search page: https://assignmentcenter.uspto.gov/

Generated 5/29/2026, 12:47:03 AM