Patent 11383405

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. 2020-11-04 · recorded 2020-12-29 · reel 054765/0097 · Assignment of Assignor's Interest

    Keita Ito; Yuichi Tajima; Yoshimasa KondoNGK Insulators, Ltd.

    Correspondent: · Wenderoth, Lind & Ponack

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

  • Keita Ito
  • Yuichi Tajima
  • Yoshimasa Kondo

All three inventors assigned their interest to NGK Insulators, Ltd. in the initial assignment record (Reel 054765/0097), indicating they were employees or contractors of the company at the time of invention. There are no indications of unusual departure patterns following the filing.

Original assignee

The original assignee is NGK Insulators Ltd., a publicly-traded Japanese company founded in 1919. NGK is a major global manufacturer of ceramic products, including insulators, honeycomb structures for automotive catalysts and filters (embodying the patent's claims), and other industrial components. The company is an active operating entity and ships products worldwide.

Assignment timeline

A search of the USPTO Patent Assignment Search database for US patent 11,383,405 reveals a single recorded assignment.

  • 2020-11-04 (executed) / recorded 2020-12-29 — Reel 054765/0097
    • Conveyance: Assignment of Assignor's Interest
    • Assignor: Keita Ito; Yuichi Tajima; Yoshimasa Kondo
    • Assignee: NGK Insulators, Ltd.
    • Correspondent: Wenderoth, Lind & Ponack, L.L.P., 1025 Connecticut Avenue, N.W., Suite 500, Washington, DC 20036
    • Context: This is the initial assignment from the named inventors to their employer, securing corporate ownership of the invention.

No further assignments have been recorded for this patent as of 2026-05-12. The ownership remains with the original assignee.

Timeline diagram

timeline
    title Ownership of US 11383405
    2020 : Filed by NGK Insulators
         : Assigned by inventors to NGK Insulators
    2022 : Issued

NPE / troll-pattern signals

  1. Shell-entity transfer: Not present. The patent remains with the original assignee, NGK Insulators Ltd., a known operating company.
  2. Known asserter in the chain: Not present. NGK Insulators Ltd. is a manufacturing company, not a known patent asserter.
  3. Repeat correspondent across the chain: Not present. There is only one assignment record.
  4. Cascading transfers: Not present. There have been no transfers since the initial assignment.
  5. Pre-litigation transfer: Not present. There have been no transfers and no known litigation involving this patent.
  6. Bankruptcy fire-sale: Not present. The assignee is a financially stable, operating company.
  7. Privateering: Not present. There is no evidence that NGK has transferred this patent to a third party for assertion.
  8. Defensive aggregator (anti-NPE): Not present. The patent is held by its original operating-company assignee.

Verdict

  • Insufficient data

The patent has never been transferred since its initial pre-issuance assignment from the inventors to the operating company, NGK Insulators Ltd. (per Reel 054765/0097). With no post-issuance assignment record, there is no evidence to analyze for NPE activity.

Verification Link: USPTO Assignment Search for Pat. 11,383,405

Generated 5/12/2026, 12:45:37 PM