Patent 11575381

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. 2022-05-24 · recorded 2022-05-31 · reel 062103/0093 · Assignment

    BADIZADEGAN, NIMAHFT SOLUTIONS, LLC

    Correspondent: DANIEL E. TROY · TROY & SCHWAB

    Inventor's assignment of interest to the original assignee

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

  • Nima Badizadegan: Employed by HFT Solutions LLC at the time of filing, as indicated by the assignment of interest shortly after filing to HFT Solutions LLC. No unusual patterns are noted, as this is a common inventor-to-assignee transfer.

Original assignee

  • HFT Solutions LLC:
    • Product embodying the claims: Unclear. The patent describes an FPGA system designed for high-frequency trading (HFT) to reduce latency in processing market and order entry data. While HFT Solutions LLC's name suggests involvement in high-frequency trading, there is no readily available information in the patent text or standard public records that indicates they directly ship a commercial product embodying the claims (e.g., an FPGA device or a system for sale to others). It is more likely they develop and use such systems for their own trading operations or solely license the technology.
    • Primary line of business: Likely high-frequency trading or the development/licensing of technology for high-frequency trading.
    • Current status: Active. Google Patents lists the legal status as "Active." The entity is currently involved in multiple litigation cases.

Assignment timeline

The USPTO Patent Assignment Search for US11575381 reveals the following record:

  • 2022-05-24 (executed) / recorded 2022-05-31 — Reel 062103/0093
    • Conveyance: ASSIGNMENT
    • Assignor: BADIZADEGAN, NIMA
    • Assignee: HFT SOLUTIONS LLC
    • Correspondent: DANIEL E. TROY, TROY & SCHWAB, LLC, 370 HICKORY HILL RD, CHESHIRE, CT 06410. This correspondent only appears once in this specific chain.
    • Context: Inventor's assignment of interest to the original assignee.

Timeline diagram

timeline
    title Ownership of US 11575381
    2018 : Priority date
    2022 : Filed by HFT Solutions LLC
         : Inventor assigned to HFT Solutions LLC
    2023 : Patent issued
    2024 : First infringement suit filed

NPE / troll-pattern signals

  1. Shell-entity transfer — Not present. The only recorded transfer is from the inventor to HFT Solutions LLC (Reel 062103/0093, 2022-05-24/2022-05-31). There is no evidence of a subsequent transfer to a licensing-only LLC.
  2. Known asserter in the chain — Present. HFT Solutions LLC, the current assignee, is identified as the patent owner/plaintiff in multiple district court infringement cases and an inter partes review (IPR) petition, as surfaced and linked by Unified Patents from the Google Patents legal events section. This activity indicates an assertion-focused entity.
  3. Repeat correspondent across the chain — Not present. Only one assignment is recorded for this specific patent (Reel 062103/0093), so there is no recurrence of a correspondent in this chain. The correspondent for this single assignment is DANIEL E. TROY, TROY & SCHWAB, LLC.
  4. Cascading transfers — Not present. Only one assignment is recorded, from the inventor to HFT Solutions LLC (Reel 062103/0093, 2022-05-24/2022-05-31).
  5. Pre-litigation transfer — Not present. The only assignment (Reel 062103/0093, 2022-05-24/2022-05-31) occurred in May 2022. The first recorded litigation cases were filed in 2024 and 2025, which is well outside the 6-month pre-litigation window.
  6. Bankruptcy fire-sale — Not present. There is no indication of the original assignee undergoing bankruptcy proceedings and selling off patents.
  7. Privateering — Unclear. There is no public evidence (e.g., SEC filings, reports by Patent Progress/EFF) to suggest that HFT Solutions LLC is asserting this patent on behalf of an operating company competitor.
  8. Defensive aggregator (anti-NPE) — Not present. The current assignee, HFT Solutions LLC, is actively asserting the patent in litigation, rather than being a defensive aggregator.

Verdict

NPE — high confidence

HFT Solutions LLC is the current assignee and has initiated multiple infringement lawsuits in federal courts (Illinois Northern District Court cases filed in 2024, Texas Western District Court case filed in 2025) and is involved in a PTAB IPR proceeding. This clear pattern of assertion, as identified via Unified Patents' litigation data, strongly indicates HFT Solutions LLC operates as a Non-Practicing Entity.

Verification: USPTO Patent Assignment Search for US11575381.

Generated 5/27/2026, 12:47:55 PM