The National Law Journal reports that 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 US District Court for the Eastern District of Virginia, alleging breach of contract, misappropriation of trade secrets and contract interference, among other claims.

Foley represented Japanese electronics manufacturer Kyocera in 2008 after SPH brought a patent infringement case against the company over technology used in its cell phones. According to last week's complaint, Foley allegedly publicized confidential information it gained during the course of that case by incorporating it in another lawsuit.