A patent holding firm has sued Foley & Lardner for allegedly revealing confidential information and for undermining the company’s settlement negotiations during a separate lawsuit.

Virginia-based SPH America, a company formed in 2008 by former Fish & Richardson associate Choongoo Park, filed suit against Foley Friday at the U.S. District Court for the Eastern District of Virginia, alleging breach of contract, misappropriation of trade secrets and contract interference, among other claims.