Patent 11799131

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. 2022-08-11 · reel 059952/0137 · Assignment of Assignors Interest

    WANG, KEFEI; WU, FEI; XIAO, LIANGZHEN; ZENG, QIAONINGDE AMPEREX TECHNOLOGY LIMITED

    Correspondent: SUZANNE E. BARNETT · DLA PIPER

    original assignment from inventors to the filing entity

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

  • Kefei Wang (Ningde Amperex Technology Ltd)
  • Qiao ZENG (Ningde Amperex Technology Ltd)
  • Liangzhen XIAO (Ningde Amperex Technology Ltd)
  • Fei Wu (Ningde Amperex Technology Ltd)

Original assignee

The original assignee is Ningde Amperex Technology Ltd.. This company is a global leader in lithium-ion battery innovation, manufacturing rechargeable cells and advanced packaging solutions for various consumer electronics, including smartphones, laptops, and tablets. They ship products embodying the claims as they specialize in manufacturing the types of batteries described in the patent. Ningde Amperex Technology Ltd. is an operating company and a subsidiary of Amperex Technology Limited (ATL), a battery manufacturing company founded in 1999. ATL is currently active and is a major supplier to tech companies like Apple and Samsung.

Assignment timeline

  • 2022-08-11 (executed) / recorded 2022-08-11 — Reel 059952/0137
    • Conveyance: Assignment of Assignors Interest
    • Assignor: WANG, KEFEI; WU, FEI; XIAO, LIANGZHEN; ZENG, QIAO
    • Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
    • Correspondent: SUZANNE E. BARNETT, DLA PIPER LLP (US), 500 8TH STREET, NW, WASHINGTON, DC 20004.
    • Context: Original assignment from inventors to the filing entity.

Timeline diagram

timeline
    title Ownership of US 11799131
    2018 : Priority date
    2022 : Filed by Ningde Amperex
         : Assigned to Ningde Amperex
    2023 : Issued to Ningde Amperex

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole assignee, Ningde Amperex Technology Ltd., is an operating company that manufactures and ships products, not a licensing-only entity.
  2. Known asserter in the chain — not present. Ningde Amperex Technology Ltd. is not identified on public NPE lists.
    • Note on specific NPEs checked: Acacia Research Corp, Marathon Patent Group (now MARA Holdings, Inc. or Marathon Digital Holdings), Intellectual Ventures, IPNav, Wi-LAN, Mosaid / Conversant, Vringo, Pendrell, Innovatio IP Ventures, MPHJ Technology, Lumen View Technology, Round Rock Research, Document Generation Corp, Erich Spangenberg entities.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment from the inventors to the original assignee, and no recurrent correspondent names are observed in this limited chain.
  4. Cascading transfers — not present. There is only one assignment recorded.
  5. Pre-litigation transfer — not present. There is no indication of litigation immediately following the assignment, and the current owner is an operating company.
  6. Bankruptcy fire-sale — not present. Ningde Amperex Technology Ltd. is an active operating company, not in bankruptcy.
  7. Privateering — not present. The patent remains with the operating company Ningde Amperex Technology Ltd.
  8. Defensive aggregator (anti-NPE) — not present. The patent is held by an operating company and has not been transferred to a defensive aggregator.

Verdict

Insufficient data. Only the initial assignment from the inventors to the original operating company, Ningde Amperex Technology Ltd., is recorded. There are no subsequent assignments that would indicate a transfer to a non-practicing entity or any other complex ownership patterns.

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

Generated 6/27/2026, 12:46:01 AM