Patent 12104578

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. 2024-02-20 · reel 066501/0453 · ASSIGNMENT OF ASSIGNORS INTEREST

    FENGER, PER E.LIFTRA IP APS

    Correspondent: R. Neil Sudol · Coleman & Sudol

    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

Original assignee

The original assignee is Liftra IP ApS. Liftra IP ApS is an operating company that provides lifting and transport solutions for the wind industry, including tools for installation and maintenance of wind turbines. Their current status is active and operating.

Assignment timeline

  • 2024-02-20 (executed) / recorded 2024-02-20 — Reel 066501/0453
    • Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST
    • Assignor: FENGER, PER E.
    • Assignee: LIFTRA IP APS
    • Correspondent: R. Neil Sudol, Coleman & Sudol, LLP, 708 Third Avenue, 14th Floor, New York, NY 10017. This correspondent has not recurred in this chain.
    • Context: Internal transfer from inventor to company.

Timeline diagram

timeline
    title Ownership of US 12104578
    2014 : Priority date
    2024 : Filed by Liftra IP ApS
         : Assigned to Liftra IP ApS
    2024 : Issued to Liftra IP ApS

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole recorded assignment is from the individual inventor to an operating company, Liftra IP ApS, which designs and manufactures equipment for the wind energy sector.
  2. Known asserter in the chain — not present. Liftra IP ApS is not identified as a known NPE.
  3. Repeat correspondent across the chain — not present. The correspondent, R. Neil Sudol of Coleman & Sudol, LLP, appears only once in this patent's assignment record.
  4. Cascading transfers — not present. There is only one assignment recorded for this patent.
  5. Pre-litigation transfer — unclear. While there is litigation associated with the patent family (IPR2026-00102 and a US case filed in Virginia Eastern District Court), the assignment to Liftra IP ApS (executed and recorded 2024-02-20) precedes the publication date of the patent (2024-10-01) and does not immediately precede the litigation dates currently known (2025 and 2026).
  6. Bankruptcy fire-sale — not present. No indication of bankruptcy for the assignor or assignee.
  7. Privateering — not present. No evidence in the public record of such an arrangement.
  8. Defensive aggregator (anti-NPE) — not present. The patent is currently assigned to Liftra IP ApS, an operating company, not a defensive aggregator.

Verdict

Insufficient data. The only recorded assignment is from the individual inventor to Liftra IP ApS, which is an operating company that manufactures products related to the patent. There are no other assignments or strong signals of NPE activity in the provided records. The existence of litigation (IPR2026-00102 and a US case in Virginia Eastern District Court) on the patent family does not, by itself, indicate an NPE, as operating companies also assert their patents.

USPTO Assignment Center search: https://assignmentcenter.uspto.gov/ (search for patent number 12104578)

Generated 5/26/2026, 6:47:42 AM