Thomas J. Connelly

Senior Patent Attorney

Tom joined the firm in 2007. He has practiced as an intellectual property attorney since 1977, and has worked as in-house counsel for a number of Fortune 500 companies. In addition to his J. D. degree, Tom holds a B.S. degree in Mechanical Engineering, an MBA degree, and a Masters of Law (LLM) degree. He is licensed to practice before the U.S. Patent and Trademark Office, before the state bars of Wisconsin, Illinois, New York, and Pennsylvania, before several U.S. District Courts, and before the U.S. Supreme Court.

Stephen C. Jensen

President & Senior Patent Attorney

Stephen (Steve) worked as an engineer for 6 years before changing careers to become a patent agent (1992) and then a patent attorney (1994). He spent a total of 17 years in the law departments of two Fortune 500 companies. In addition to his J.D. degree, he holds a B.S. degree in Physics and an M.S. degree in Electrical Engineering, with a concentration in optics. He is licensed to practice before the U.S. Patent and Trademark Office, before the state bars of Wisconsin and Minnesota, and before the U.S. District Court for the Eastern District of Wisconsin.

He has strong ties to Wisconsin, including an uncle (Charles F. Jensen) who was a small town attorney in the Stevens Point, Plainfield, and Tomahawk areas. Growing up in a big family that lived in Stevens Point, Iola, and then Appleton, Stephen left the state to find work, but–for almost 30 years–hoped to return to this northern part of Wisconsin he loved so much.  The opportunity came in 2013, when he returned to the area and joined Tom Wilhelm’s firm.  He bought the firm from Tom in March, 2015.

Kerry Fox


Kerry joined the firm in 2017. She holds a B.A. degree in Writing and an M.B.A. degree from Lakeland University, and a Paralegal Certificate from the American Institute for Paralegal Studies.

Isadora Keberlein


Isadora (Izzy) joined the firm in 2017. She completed her A.A.S. degree in Paralegal Studies from the Fox Valley Technical College in May 2018.

Dianne Coonen

Financial Manager & Paralegal

Dianne joined us as a paralegal in May, 2016. At that time she had over 34 years of business experience, including over seventeen years in paralegal positions, and other work experience in most every legal discipline, including intellectual property (IP) at Fives Machining Systems, Inc. and Orion Energy Systems, Inc. She also earned her Master of Business Degree in 2013.

In July, 2016, Dianne was promoted to the position of Financial Manager in which she ensures the integrity of accounting information by recording, verifying, consolidating, and entering transactions for our team’s legal work, as well as numerous related responsibilities. She also retains paralegal responsibilities, and responds to ad hoc requests, assists with firm audits, mentors and trains staff, and works collaboratively with our team and with our clients at all levels of support.