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.

Assignment history

Inventors

Xiaoling CHE: The sole inventor listed on the patent. The original and current assignee is "Individual," indicating the inventor has retained ownership from the time of filing.

Original assignee

The original assignee is the inventor, Xiaoling CHE. The patent text lists the assignee as "Individual." The invention is a "Puzzle platform." Based on the available information, it is unclear whether the inventor has manufactured or shipped a commercial product embodying the claims of US patent 12491430.

Assignment timeline

A search of the USPTO Patent Assignment Search database reveals no recorded assignments for US patent 12491430 as of 2026-05-13. The patent ownership remains with the original inventor.

Timeline diagram

timeline
    title Ownership of US 12491430
    2021 : Earliest priority date
    2025 : Application filed
         : Issued and granted to inventor

NPE / troll-pattern signals

Shell-entity transfer: Not present. There are no recorded assignments transferring the patent from the inventor to any other entity.
Known asserter in the chain: Not present. The patent remains with the inventor; no known asserters appear in the chain.
Repeat correspondent across the chain: Not present. There are no recorded assignments and therefore no correspondents of record for any transfers.
Cascading transfers: Not present. There have been no assignments.
Pre-litigation transfer: Not present. There have been no assignments.
Bankruptcy fire-sale: Not present. There is no evidence that the original assignee (the inventor) has undergone bankruptcy or sold assets in such a proceeding.
Privateering: Not present. The patent has not been transferred to a third-party asserter.
Defensive aggregator (anti-NPE): Not present. The patent has not been assigned to a defensive aggregator.

Verdict

Insufficient data

The patent has no recorded assignments and remains with the original inventor, Xiaoling CHE. Without any transfers, litigation history, or other assertion-related activity, there is no evidence to suggest NPE-related behavior or intent.

Verification Link: USPTO Assignment Search for US 12491430