The Simon Law Firm

The Simon Law Firm, P.C., headquartered in St. Louis, Missouri, with an additional office in Kansas City, is a distinguished regional litigation firm recognized for its intellectual property practice. The firm has been recognized as a Tier 1 Patent Litigation Firm by U.S. News - Best Law Firms® since 2013 and earned a national ranking in Mass Tort Litigation/Class Actions – Plaintiffs in the 2025 edition. It has also been noted as one of the "winningest firms" in the United States by The National Law Journal, reflecting its significant trial successes. The firm describes itself as capable of handling complex cases while maintaining a client-focused, agile approach.

The firm specializes in a broad range of IP litigation, including patent, copyright, trademark infringement, Hatch-Waxman litigation, and trade secret disputes. Its patent litigation experience spans diverse technology areas, notably mercury emissions-control technology as seen in the Midwest Energy Emissions Corp. cases, and wireless communication technology from its representation of Ginko LLC. The firm's advertised results highlight expertise in mobile phone, videoconferencing, instant messaging, and internet phone technologies.

The Simon Law Firm primarily represents plaintiffs, with eight of its ten tracked appearances being on the plaintiff side in patent infringement matters. This focus is consistent with the firm's stated commitment to "fighting for and protecting the creative ideas that others have stolen from them." While predominantly plaintiff-oriented, the firm has also acted for defendants, notably representing Ginko LLC in its defense against Unified Patents.

Notable cases include its involvement in multiple patent infringement actions for Midwest Energy Emissions Corp. against utility companies like Ameren Corp. and Evergy, Inc., concerning mercury emissions-control technology. These cases have been transferred and consolidated into a multi-district litigation (MDL) in the Southern District of Iowa for coordinated pretrial proceedings. The firm's reported successes include substantial settlements and verdicts in patent infringement cases, such as a $38 million settlement related to video conferencing technology and a $36 million settlement for mobile phone patent infringement.

The firm also possesses a notable PTAB (Patent Trial and Appeal Board) and IPR (Inter Partes Review) practice. Its defense of Ginko LLC in an IPR proceeding initiated by Unified Patents demonstrates its activity in challenging patent validity before the USPTO. Key IP litigation partners include Anthony G. Simon, the founder of the Intellectual Property Group and a repeatedly recognized Best Lawyers® Lawyer of the Year for Patent Litigation, and Jeremiah W. Nixon, who is also active in intellectual property and complex business litigation. Timothy D. Krieger, a registered patent attorney with degrees in electrical and computer engineering, brings extensive experience in IPR, Post Grant Review (PGR), and Covered Business Method (CBM) proceedings before the USPTO.