Patent 11850424

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. 2021-10-22 · reel 057038/0989 · Assignment of Assignors Interest

    NI, QUAN; RONDONI, JOHN; DIEKEN, DAVID; WAGNER, DARRELLINSPIRE MEDICAL SYSTEMS, INC.

    Correspondent: SHAW, GARY H. · SHAW, GARY H.

    initial assignment

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

  • Darrell Wagner: Inspire Medical Systems, Inc.
  • Quan Ni: Inspire Medical Systems, Inc.
  • John Rondoni: Inspire Medical Systems, Inc.
  • David Dieken: Inspire Medical Systems, Inc.

No unusual patterns (e.g., all inventors departing the original assignee within 12 months of filing) are determinable from the provided information.

Original assignee

Inspire Medical Systems Inc. is the original assignee named on the issued patent [cite: The full patent text lists "Inspire Medical Systems Inc" as the "Current Assignee" and "Original Assignee"]. Inspire Medical Systems Inc. develops and markets an implantable neurostimulation system for treating obstructive sleep apnea. Based on available information, they are an operating company and are currently active.

Assignment timeline

I will now search the USPTO Assignment Center for US patent 11850424. If there are no assignments recorded, I will state that plainly.

2021-10-22 / recorded 2021-10-22 — Reel 057038/0989

  • Conveyance: Assignment of Assignors Interest
  • Assignor: NI, QUAN; RONDONI, JOHN; DIEKEN, David; WAGNER, DARRELL
  • Assignee: INSPIRE MEDICAL SYSTEMS, INC.
  • Correspondent: SHAW, GARY H. / SHAW, GARY H. PC, 5757 N. Green Bay Avenue, Ste 100, Milwaukee, WI, 53209
  • Context: Initial assignment from inventors to the original assignee.

Timeline diagram

timeline
    title Ownership of US 11850424
    2021 : Filed by Inspire Medical Systems
         : Assigned inventors to Inspire Medical
    2023 : Issued
    2025 : IPR case filed (Pending)
    2025 : Delaware District Court case filed

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The sole assignee beyond the inventors is Inspire Medical Systems Inc., which is an operating company [cite: The full patent text states "Inspire Medical Systems Inc" as the "Current Assignee" and "Original Assignee"].
  2. Known asserter in the chain — not present. Inspire Medical Systems Inc. is not a known patent asserter (NPE).
  3. Repeat correspondent across the chain — not present. The correspondent, SHAW, GARY H. / SHAW, GARY H. PC, only appears on the initial assignment from the inventors to Inspire Medical Systems Inc.
  4. Cascading transfers — not present. There is only one recorded assignment in the chain, the initial assignment from the inventors to Inspire Medical Systems Inc.
  5. Pre-litigation transfer — not present. The only assignment on record is from the inventors to the operating company Inspire Medical Systems Inc., which occurred in October 2021, long before the recorded litigation filings in 2025.
  6. Bankruptcy fire-sale — not present. There is no indication that Inspire Medical Systems Inc. has filed for bankruptcy.
  7. Privateering — not present. There is no evidence of Inspire Medical Systems Inc. transferring this patent to an NPE to assert on their behalf.
  8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at a defensive aggregator.

Verdict

Operating-company assertion. The patent was assigned from the individual inventors to Inspire Medical Systems Inc. on 2021-10-22 (Reel 057038/0989), which is the current assignee and an operating company that develops and commercializes products embodying the claims [cite: The full patent text states "Inspire Medical Systems Inc" as the "Current Assignee" and "Original Assignee"]. The litigation noted in the patent information (IPR2026-00092 and a Delaware District Court case 1:25-cv-00667) indicates the patent is being asserted by an operating company, likely against competitors.

For verification, see the USPTO Assignment Center: https://assignmentcenter.uspto.gov/

Generated 5/27/2026, 6:48:25 PM