Greenthread LLC

Greenthread, LLC is a Texas-based private company formed in October 2004. It was co-founded by G.R. Mohan Rao, the named inventor on the patents the company asserts, and Philip W. John Jr. Greenthread, LLC is a separate entity from Green Threads, LLC, a Maryland-based IT services provider. Public information regarding Greenthread's employee count or revenue is not available. Reports indicate the company's litigation has been backed by investment manager Empyrean Capital Partners.

Greenthread is a non-practicing entity (NPE) that generates revenue through patent licensing and litigation. The company has no known products or services and its activities center on asserting a portfolio of patents related to semiconductor fabrication. The patents, acquired from inventor and company director G.R. Mohan Rao, generally cover semiconductor devices with "graded dopant regions," a technology intended to improve transistor and device performance.

The company's patent-litigation posture is exclusively that of a plaintiff, which is typical for an NPE. As of May 2026, Greenthread has filed at least 10 lawsuits as a plaintiff and has not been named as a defendant in any tracked cases. Its litigation campaign has been spread across several federal jurisdictions, including the U.S. District Courts for the Western and Eastern Districts of Texas and the District of Delaware.

Greenthread has sued a wide range of major semiconductor manufacturers, automotive companies, and other technology firms. Notable defendants include Intel, General Motors, NXP, ON Semiconductor, STMicroelectronics, and Monolithic Power Systems. The company's litigation efforts have faced significant headwinds; multiple defendants have challenged the validity of Greenthread's patents before the Patent Trial and Appeal Board (PTAB). In some instances, these inter partes review (IPR) proceedings have resulted in the invalidation of patent claims, impacting Greenthread's district court cases.