Jonathan E. Grossman, Esq.


Mr. Grossman is a litigator and legal strategist with the law firm Williams, Montgomery & John. He represents clients in patent disputes in Federal courts and also guides them through complex patent licensing and due diligence efforts. Mr. Grossman has a decade of experience representing clients in Hatch-Waxman litigation and due diligence. He has represented clients in matters at the Court of Appeals for the Federal Circuit, district court litigations in a variety of jurisdictions, proceedings before the United States Patent and Trademark Office, and arbitrations. He has also analyzed thousands of agreements and advised clients in IP-intensive transactions.

Mr. Grossman started his career at Goodwin Procter LLP in New York where he represented multinational corporations in Hatch-Waxman and medical device patent litigation and due diligence projects. He left Goodwin to serve as in-house patent counsel at an international pharmaceutical company and then left his in-house role to start his own practice before eventually joining Williams, Montgomery & John. Throughout his career, Mr. Grossman has participated in complex patent litigations, advised businesses on patent strategies, drafted and negotiated agreements, worked with product development teams, and run his own business. He also gained an understanding of business operations and experience advising personnel at all levels. Mr. Grossman’s work required travel to Europe and Asia and collaboration with individuals from many different cultures and business units.

Mr. Grossman is admitted in Illinois, New York, and with the United States Patent and Trademark Office. He received his B.A. in chemistry from Northwestern University (with honors) and J.D. from the University of Kansas School of Law. At KU Law, Mr. Grossman was a member of the Kansas Law Review, founded the BioLaw Symposium, graduated toward the top of his class, and was awarded the Faculty Award for Outstanding Scholastic Achievement for the most significant contribution toward overall legal scholarship.

“Mr. Grossman provided one of the best services I have had the privilege to enjoy. In any field of collaboration. Simply excellent, reliable, flexible and very fair.”


“Very happy! Jon did an excellent job on an extremely large and complicated patent, and worked long hours (including weekends!) to help me hit my tight deadline! I will definitely be hiring him again in future.”


“I’ve worked with many attorneys, and Jonathan is absolutely phenomenal! He’s both highly expert and broadly experienced in the intricacies of patent law and was able to provide expert advice to assist with new developments such as Alice with regards to software patents. Jonathan has proven himself to be extremely responsive, very fair and honest in billing, and able to quickly understand even extremely technical and cryptographic discussions. I will absolutely be calling on Jonathan again. My highest recommendation!”