Patent 11505231

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 (2)

Asserters network →

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

  1. 2022-07-29 · recorded 2022-08-04 · reel 061298/0871 · Assignment

    ZEHFUSS, MARK; LEE, JON HEE; ROE, MEGAN; SIMPSON, STACY NOELBABY JOGGER, LLC

    Correspondent: · Dinsmore & Shohl

    Assignment of invention rights from inventors to the original corporate assignee

  2. 2026-01-23 · recorded 2026-02-12 · reel 062638/0950 · Assignment

    BABY JOGGER, LLCBABY JOGGER II, LLC

    Correspondent: · Dinsmore & Shohl

    Internal corporate restructuring/transfer between related entities

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

The named inventors are Mark Zehfuss, Jon Hee Lee, Megan Roe, and Stacy Noel Simpson. They assigned their interest in the patent application to Baby Jogger, LLC on the filing date of the present application (2022-07-29), indicating they were likely employees or contractors of Baby Jogger, LLC or its predecessors at the time the invention was made.

Original assignee

The original assignee on the filing date of the US11505231 patent was Baby Jogger, LLC. Baby Jogger is an operating company known for designing and manufacturing strollers and related juvenile products, which are products embodying the claims of this patent (e.g., strollers with removable seats). The company's status appears to be active, with a recent internal transfer to "Baby Jogger II, LLC".

Assignment timeline

  1. 2022-07-29 (executed) / recorded 2022-08-04 — Reel 061298/0871

    • Conveyance: Assignment
    • Assignor: ZEHFUSS, MARK; LEE, JON HEE; ROE, MEGAN; SIMPSON, STACY NOEL
    • Assignee: Baby Jogger, LLC
    • Correspondent: Dinsmore & Shohl LLP, Dinsmore & Shohl LLP, 255 E. 5th Street, Suite 1900, Cincinnati, OH 45202. This correspondent also appears on a later assignment in this chain.
    • Context: Assignment of invention rights from inventors to the original corporate assignee.

  2. 2026-01-23 (executed) / recorded 2026-02-12 — Reel 062638/0950

    • Conveyance: Assignment
    • Assignor: Baby Jogger, LLC
    • Assignee: BABY JOGGER II, LLC
    • Correspondent: Dinsmore & Shohl LLP, Dinsmore & Shohl LLP, 255 E. 5th Street, Suite 1900, Cincinnati, OH 45202. This correspondent also appears on an earlier assignment in this chain.
    • Context: Internal corporate restructuring/transfer between related entities.

Timeline diagram

timeline
    title Ownership of US 11505231
    2008 : Priority date
    2022 : Inventors assigned to Baby Jogger LLC
    2022 : Filed by Baby Jogger LLC
    2022 : Issued
    2026 : Assigned to Baby Jogger II LLC

NPE / troll-pattern signals

  1. Shell-entity transfer — Not present. The transfers are between "Baby Jogger, LLC" and "BABY JOGGER II, LLC", which appear to be related operating entities, not shell entities.
  2. Known asserter in the chain — Not present. Neither Baby Jogger, LLC nor BABY JOGGER II, LLC are identified on common NPE lists.
  3. Repeat correspondent across the chain — Present. Dinsmore & Shohl LLP, based in Cincinnati, OH, is listed as the correspondent for both the assignment recorded on 2022-08-04 (Reel 061298/0871) and the assignment recorded on 2026-02-12 (Reel 062638/0950).
  4. Cascading transfers — Not present. There are only two assignments (one from inventors, one internal) over approximately three and a half years, which does not indicate rapid cascading transfers.
  5. Pre-litigation transfer — Unclear. Publicly available information indicates litigation was filed in 2024 and 2025. The first recorded assignment to the original assignee occurred on 2022-07-29 (Reel 061298/0871), well before the reported litigation. A subsequent internal transfer occurred on 2026-01-23 (Reel 062638/0950), after the initial litigation filings. Therefore, this specific transfer was not a pre-litigation transfer to initiate assertion, although it could be related to ongoing litigation strategy.
  6. Bankruptcy fire-sale — Not present. There is no indication that Baby Jogger, LLC underwent a bankruptcy sale for this patent.
  7. Privateering — Not present. The assignments are between closely related operating entities, not to a distinct NPE acting on behalf of a competitor.
  8. Defensive aggregator (anti-NPE) — Not present. The chain ends with BABY JOGGER II, LLC, which is not a known defensive aggregator.

Verdict

Operating-company assertion
The patent remains within the corporate structure of Baby Jogger, an operating company known for producing products embodying the patent claims. While litigation has been initiated, the ownership chain indicates these are assertions made by an operating company, not a non-practicing entity.

USPTO Assignment Center search for US11505231: https://assignmentcenter.uspto.gov/patent/11505231

Generated 5/17/2026, 12:47:14 AM