John Hemmer is a patent lawyer who focuses on implementing intellectual property (IP) programs for clients involving mechanical and life science technologies. Clients turn to John for counsel on patent portfolio management, patent strategy, product clearance, patentability analyses, and patent challenges including inter partes reviews. John also provides support for patent litigation, prepares and negotiates technology agreements, and works with clients on venture capital financing, merger and acquisition agreements, initial public offerings, and IP due diligence.
With a background in mechanical engineering, John has experience with writing and prosecuting utility and design patent applications for a wide variety of technologies, including medical devices, military equipment, home security and virtual assistants, plumbing fixtures, cleantech technologies, automotive mechanisms, electromechanical devices, consumer products and packaging, sporting equipment, and mobility devices.
Active in community affairs, John is a volunteer for Neighborhood Bike Works, an advisory board member for Back on My Feet Philadelphia, and a member of the Penn State Scholar Alumni Society Board.
Temple University, Beasley School of Law, 2006, J.D.
Pennsylvania State University Schreyer Honors College, 2003, B.S., magna cum laude
U.S. District Court for the District of New Jersey
U.S. District Court for the Eastern District of Pennsylvania
U.S. Patent and Trademark Office
Awards and Affiliations
Recognized, Patent Law, Philadelphia, The Best Lawyers in America (2020)
Rising Star, Pennsylvania Super Lawyers (2016–2019)