Patent 11209863

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.

2020-01-27 · reel 051053/0760 · Assignment of Assignors Interest
DELAPORTE, STEPHEN E.LEPTON COMPUTING LLC
Correspondent: Matthew J. R. Marcou · Attorney at Law
Transfer of inventor's rights to the original assignee

Assignment history

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Inventors

The sole inventor listed is Stephen E. Delaporte. His employer at the time of filing is not explicitly stated in the patent document, but the original assignment record indicates his interest was assigned to Lepton Computing LLC.

Original Assignee

The original assignee named on the issued patent is Lepton Computing LLC. Based on the information available, there is no public record indicating that Lepton Computing LLC shipped a product embodying the claims of US11209863. Its primary line of business appears to be intellectual property holding and licensing. Lepton Computing LLC is listed as the "Current Assignee" and "Original Assignee" on Google Patents and is active, currently asserting this patent in litigation.

Assignment Timeline

A search on the USPTO Assignment Center for patent number 11209863 yields the following record:

2020-01-27 (executed) / recorded 2020-01-27 — Reel 051053/0760
- Conveyance: Assignment of Assignors Interest
- Assignor: Delaporte, Stephen E.
- Assignee: Lepton Computing LLC
- Correspondent: Matthew J. R. Marcou, Attorney at Law, P.C., 28 W. 27th Street, 7th Floor, New York, NY, 10001
- Context: Transfer of inventor's rights to the original assignee.

No further assignments for US11209863 are publicly recorded on the USPTO Assignment Center. This indicates that Lepton Computing LLC remains the current owner of record for this patent.

Timeline Diagram

timeline
    title Ownership of US 11209863
    2010 : Priority date
    2019 : Application filed
    2020 : Inventor assigns to Lepton Computing LLC
    2021 : Patent granted to Lepton Computing LLC
    2026 : Litigation filed by Lepton Computing LLC

NPE / Troll-Pattern Signals

Shell-entity transfer — Present. Lepton Computing LLC's self-description and activities align with a shell entity. The company claims to be an "original developer of foldable phones" with prototypes dating back to 2008, yet it has never released a smartphone. Recent news reports describe Lepton Computing LLC as having "no public contact details and apparently just two employees," and explicitly label it as a "patent troll" or "Non-Practicing Entity" (NPE). The company's focus appears to be on patenting and asserting its IP rather than product development and sales. The current litigation against Samsung further supports this, as Lepton is seeking damages, royalties, and an injunction against Samsung's foldable phones.
Known asserter in the chain — Present. Lepton Computing LLC is identified as a patent asserter (NPE) by multiple news sources, particularly in the context of its current lawsuit against Samsung.
Repeat correspondent across the chain — Unclear. While Matthew J. R. Marcou is the correspondent for the only recorded assignment (Reel 051053/0760), there are no other assignments for this specific patent to establish a pattern of recurrence within this chain. Without additional data from other patents or external lists of NPE correspondents, it's unclear if this correspondent is a repeat player for NPEs.
Cascading transfers — Not present. Only one assignment from the inventor to Lepton Computing LLC is recorded, not multiple consecutive transfers.
Pre-litigation transfer — Not present. The assignment from the inventor to Lepton Computing LLC was recorded on January 27, 2020 (Reel 051053/0760), while the first infringement suit naming this patent was filed in April 2026. This gap is significantly longer than 6 months.
Bankruptcy fire-sale — Not present. There is no indication of Lepton Computing LLC being in bankruptcy or the patent being sold in such proceedings.
Privateering — Unclear. While Lepton Computing LLC is asserting patents against Samsung, there is no public information linking this assertion back to a specific operating company's strategy against competitors. Lepton Computing LLC positions itself as an "original developer" rather than an agent of another company.
Defensive aggregator (anti-NPE) — Not present. The chain ends with Lepton Computing LLC, which is identified as an NPE, not a defensive aggregator.

Verdict

NPE — high confidence

This verdict is based on strong signals that Lepton Computing LLC operates as a Non-Practicing Entity. Multiple recent news reports explicitly identify Lepton Computing LLC as a "patent troll" or NPE, highlighting its history of patent filings without corresponding product releases and its current litigation strategy against Samsung. The sole recorded assignment (Reel 051053/0760) is from the inventor to Lepton Computing LLC, which then holds the patent and asserts it, aligning with a common NPE pattern.

USPTO Assignment Center search for US11209863: https://assignmentcenter.uspto.gov/patent/assignment-result-download?id=11209863

Generated 6/1/2026, 6:48:55 AM