Patent 8781610

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 (4)

Asserters network →

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

  1. 2013-12-20 · reel 031498/0746 · Assignment

    HAN, ZHENGZEPP LABS, INC.

    Correspondent: · BLANK ROME

    Transfer from inventor to original assignee

  2. 2018-08-30 · reel 046487/0056 · Assignment

    ZEPP LABS, INC.HUAMI HK LIMITED

    Correspondent: · AMERICAN PATENT AGENCY

    acquisition

  3. 2018-10-16 · reel 046598/0025 · Assignment

    HUAMI HK LIMITEDBeijing Shunyuan Kaihua Technology Limited

    Correspondent: · AMERICAN PATENT AGENCY

    internal reorg

  4. 2026-04-10 · reel 060593/0890 · Assignment

    Beijing Shunyuan Kaihua Technology LimitedZEPP NORTH AMERICA, INC.

    Correspondent: · AMERICAN PATENT AGENCY

    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.

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Inventors

  • Zheng Han (Zepp Labs Inc) [cite: The full patent text, under "Inventor", "Original Assignee"]

Original assignee

Zepp Labs Inc. The patent describes a "method of ball game motion recognition, apparatus for the same, and motion assisting device" [cite: The full patent text, under "Title"]. Zepp Labs Inc. developed and shipped products embodying these claims, specifically motion sensors for sports like golf and baseball that connect to mobile apps for swing analysis. Zepp Labs Inc. was acquired by Huami Corp. (now Zepp Health Corporation) in 2018.

Assignment timeline

  • 2013-12-20 (executed) / recorded 2013-12-20 — Reel 031498/0746

    • Conveyance: Assignment
    • Assignor: Han, Zheng
    • Assignee: Zepp Labs, Inc.
    • Correspondent: BLANK ROME LLP. This correspondent has not recurred in this chain.
    • Context: Transfer from inventor to original assignee.

  • 2018-08-30 (executed) / recorded 2018-08-30 — Reel 046487/0056

    • Conveyance: Assignment
    • Assignor: ZEPP LABS, INC.
    • Assignee: HUAMI HK LIMITED
    • Correspondent: AMERICAN PATENT AGENCY, LLC. This correspondent has not recurred in this chain.
    • Context: Acquisition

  • 2018-10-16 (executed) / recorded 2018-10-16 — Reel 046598/0025

    • Conveyance: Assignment
    • Assignor: HUAMI HK LIMITED
    • Assignee: Beijing Shunyuan Kaihua Technology Limited
    • Correspondent: AMERICAN PATENT AGENCY, LLC. This correspondent appeared previously in this chain.
    • Context: Internal reorg

  • 2026-04-10 (executed) / recorded 2026-04-10 — Reel 060593/0890

    • Conveyance: Assignment
    • Assignor: Beijing Shunyuan Kaihua Technology Limited
    • Assignee: ZEPP NORTH AMERICA, INC.
    • Correspondent: AMERICAN PATENT AGENCY, LLC. This correspondent appeared previously in this chain.
    • Context: Internal reorg

Timeline diagram

timeline
    title Ownership of US 8781610
    2011 : Application filed by Zepp Labs Inc
    2013 : Assigned to Zepp Labs Inc
    2014 : Application granted
    2018 : Assigned to Huami HK Limited
         : Assigned to Beijing Shunyuan Kaihua
    2026 : Assigned to Zepp North America Inc

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. While there are transfers between different corporate entities, these appear to be within a larger corporate structure (Zepp/Huami) rather than to a licensing-only shell entity with no apparent products.
  2. Known asserter in the chain — not present. None of the assignees (Zepp Labs, Huami HK Limited, Beijing Shunyuan Kaihua Technology Limited, Zepp North America, Inc.) are publicly listed as known NPEs.
  3. Repeat correspondent across the chain — present. AMERICAN PATENT AGENCY, LLC is listed as the correspondent for the assignments recorded on 2018-08-30 (Reel 046487/0056), 2018-10-16 (Reel 046598/0025), and 2026-04-10 (Reel 060593/0890).
  4. Cascading transfers — present. Two assignments occurred within two months in 2018: 2018-08-30 (executed) to Huami HK Limited and 2018-10-16 (executed) to Beijing Shunyuan Kaihua Technology Limited. These entities also share the same correspondent. [cite: The full patent text, under "Legal status"]
  5. Pre-litigation transfer — unclear. The Google Patents entry indicates litigation was filed in the Texas Eastern District Court, but no specific filing date for the first suit is provided to compare against assignment dates.
  6. Bankruptcy fire-sale — not present. There is no indication in the provided text or assignment records of any bankruptcy proceedings involving Zepp Labs Inc. or subsequent assignees.
  7. Privateering — not present. There is no evidence in the provided text to suggest privateering.
  8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at a known defensive aggregator.

Verdict

Insufficient data. While there is a signal of "cascading transfers" and a "repeat correspondent" across several assignments (Reel 046487/0056, Reel 046598/0025, and Reel 060593/0890), there is not enough information to confidently classify this as an NPE. The assignees appear to be related corporate entities (Zepp/Huami ecosystem), suggesting internal reorganizations or acquisitions rather than transfers to shell entities for assertion. The lack of specific litigation details also makes a "pre-litigation transfer" determination impossible.

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

Generated 5/30/2026, 6:48:09 AM