Assignment history — US Patent 10651866

Inventors

Dashen Fan: Employer not explicitly stated in the patent document, but Google Patents lists him as an inventor associated with Kopin Corporation in other patents.
Joseph Yong Kwon: Employer not explicitly stated in the patent document, but Google Patents lists him as an inventor associated with Kopin Corporation in other patents.

Original assignee

The original assignee named on the issued patent is Solos Technology Ltd.

Solos Technology Ltd. (also referred to as Solos Technology Limited) initially developed smart glasses technology. Solos is a tech startup spun off from Kopin Corporation, focusing on smart glasses with fitness and audio functions, including patented noise cancellation technology called Whisper™ Audio Technology. Solos also highlights its IP portfolio of over 100 patents and patent applications related to smart eyewear.

More recently, Solos Technology has rebranded and shifted its primary line of business to aroma recovery systems for premium dealcoholized beverages, utilizing a multi-patented solid-phase extraction innovation.

As of May 30, 2026, Solos Technology Ltd. appears to be an active, operating company, albeit with a significant shift in its core product focus. It is currently involved in patent infringement litigation concerning its smart glasses technology.

Assignment timeline

There are no recorded assignments for U.S. Patent 10,651,866 on the USPTO Assignment Center as of today's date, 2026-05-30.

This indicates that the original assignee, Solos Technology Ltd., still officially owns the patent according to USPTO records.

Timeline diagram

timeline
    title Ownership of US 10651866
    2019 : Application filed by Solos Technology Ltd
    2020 : Patent granted to Solos Technology Ltd
    2026 : Solos Technology Ltd files infringement suit

NPE / troll-pattern signals

Shell-entity transfer — not present. The patent remains with Solos Technology Ltd., which initially developed smart glasses products and is now active in the aroma recovery market.
Known asserter in the chain — unclear. While Solos Technology Ltd. has filed an infringement lawsuit, it is not listed as a known NPE on common directories (RPX, Unified Patents). However, its shift in product focus away from smart glasses while asserting patents in that domain could suggest a licensing-focused strategy for its older IP.
Repeat correspondent across the chain — not present. With no recorded assignments, there is no chain of correspondents to analyze.
Cascading transfers — not present. There are no recorded assignments.
Pre-litigation transfer — not present. There are no recorded assignments of the patent prior to the January 23, 2026, infringement lawsuit.
Bankruptcy fire-sale — not present. There is no indication that Solos Technology Ltd. has filed for bankruptcy.
Privateering — unclear. Solos Technology Ltd. was spun off from Kopin Corporation, and Kopin Corporation is still an active company. The relationship between Solos and Kopin regarding the assertion of this patent, and whether Kopin benefits from Solos's litigation, is not explicitly clear from the available public records.
Defensive aggregator (anti-NPE) — not present. The patent is currently owned by Solos Technology Ltd., an operating company.

Verdict

Operating-company assertion

While Solos Technology Ltd. has undergone a significant pivot in its primary line of business, it was initially an operating company that developed smart glasses technology. The current infringement lawsuit against Meta Platforms, Inc., et al. (Case# 1:26-cv-10304) involves the assertion of this patent, which relates to the smart glasses technology Solos previously developed. The absence of recorded assignments on the USPTO Assignment Center confirms that Solos Technology Ltd. remains the owner, indicating an assertion by the original developer of the technology.

USPTO Assignment Center search: https://assignmentcenter.uspto.gov/