Patent 11574990

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. 2012-08-02 · recorded 2022-07-03 · reel 059434/0045 · Assignment

    KIM, SE-HO; LEE, WON-SE; PARK, JIN-WOOSAMSUNG DISPLAY CO., LTD.

    Correspondent: JEONG, SANG HUI · KIM AND LEE

    Initial assignment from inventors to corporate employer

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

  • Se-Ho Kim (Samsung Display Co Ltd)
  • Jin-woo Park (Samsung Display Co Ltd)
  • Won-Se Lee (Samsung Display Co Ltd)

The assignment from the inventors to Samsung Display Co., Ltd. was executed on 2012-08-02, which is the priority date of the earliest application in the patent family (Korean Patent Application No. 10-2012-0084976). This is a standard practice for employees to assign their invention rights to their employer. There is no unusual pattern suggesting the inventors departed the company around the time of filing or initial assignment.

Original assignee

Samsung Display Co Ltd. They are a global leader in the development and manufacturing of display technologies, including organic light emitting diode (OLED) displays, which directly embody the claims of this patent. Samsung Display Co Ltd is currently operating as a subsidiary of [Samsung Electronics Co., Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.)

Assignment timeline

  • 2012-08-02 (executed) / recorded 2022-07-03 — Reel 059434/0045
    • Conveyance: Assignment
    • Assignor: KIM, SE-HO; LEE, WON-SE; PARK, JIN-WOO
    • Assignee: SAMSUNG DISPLAY CO., LTD.
    • Correspondent: JEONG, SANG HUI, KIM AND LEE, P.C., SEOUL, KR
    • Context: Initial assignment from inventors to corporate employer.

No other assignment records were found for US11574990 in the USPTO Assignment Center.

Timeline diagram

timeline
    title Ownership of US 11574990
    2012 : Invented; assigned to Samsung Display
    2022 : Application filed; Assignment recorded
    2023 : Patent issued
    2025 : Litigation filed TX ED, IPR filed

NPE / troll-pattern signals

  1. Shell-entity transfer — Not present. The only recorded transfer is from the individual inventors to Samsung Display Co., Ltd., a known operating company.
  2. Known asserter in the chain — Not present. Samsung Display Co., Ltd. is the current assignee, which is an operating company, not a known NPE.
  3. Repeat correspondent across the chain — Not present. There is only one recorded assignment for this patent. The correspondent, JEONG, SANG HUI of KIM AND LEE, P.C., appears only once.
  4. Cascading transfers — Not present. There is only one recorded assignment for this patent.
  5. Pre-litigation transfer — Not present. The patent was issued on 2023-02-07. The first litigation (case 2:25-cv-00412) was filed in 2025. The only assignment recorded was on 2022-07-03, from the inventors to Samsung Display, well before the patent issued and long before any litigation.
  6. Bankruptcy fire-sale — Not present. Samsung Display Co., Ltd. is a financially sound operating company and there are no indications of bankruptcy proceedings.
  7. Privateering — Unclear. While Samsung Display is an operating company, the nature of its litigation activities (e.g., in the Eastern District of Texas, which is known for patent assertions) could theoretically involve privateering. However, there is no direct evidence from the assignment chain or public records provided to confirm this.
  8. Defensive aggregator (anti-NPE) — Not present. The patent is currently held by Samsung Display Co., Ltd., not a defensive aggregator.

Verdict

Operating-company assertion
Samsung Display Co., Ltd. is an operating company that manufactures OLED displays, which embody the claims of US11574990. The sole recorded assignment (Reel 059434/0045, executed 2012-08-02, recorded 2022-07-03) is the initial transfer from the inventors to Samsung Display, which is standard practice. Recent litigation activities (US case 2:25-cv-00412 filed in Texas Eastern District Court and IPR2025-01478) indicate that Samsung Display is asserting this patent, likely against competitors.

USPTO Assignment Center: https://assignmentcenter.uspto.gov/
Unified Patents litigation data: https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/2%3A25-cv-00412
Unified Patents PTAB data: https://portal.unifiedpatents.com/ptab/case/IPR2025-01478

Generated 5/23/2026, 6:48:42 AM