Donald R. Hageman III

Don has extensive experience representing clients in contested proceedings before the Trademark Trial and Appeal Board (TTAB) and the Patent Trial and Appeal Board (PTAB), handling opposition and cancellation proceedings, post-grant challenges, and administrative appeals that often run parallel to district court litigation.

Beyond IP litigation, Don regularly advises clients on IP portfolio management, licensing, asset purchase agreements, and IP due diligence for mergers and acquisitions. Don’s practice has spanned industries including global insurers, pharmaceutical companies, foreign automotive manufacturers, SaaS providers, medical device companies, artificial intelligence, emerging technologies, and early-stage technology firms.

On the business transactional side, Don assists in offering strategic guidance to developers, contractors, architects, and other stakeholders involved in construction projects of varying scales. From contract negotiation and drafting to dispute resolution, Don ensures that clients are equipped with the legal framework necessary to mitigate risks and achieve their project objectives efficiently. Additionally, Don has helped navigate zoning regulations and land use issues for clients involving the sale of a quarry to a large construction company.

Don attended Saint Louis University School of Law as a Dean’s Select Scholar, earning his Juris Doctorate. While in law school Don was the co-president of the school’s Student IP Association. Additionally, he was on SLU Law’s patent drafting team, who placed third out of twenty teams in the regional round at the USPTO 2023 National Patent Application Drafting Competition. Before law school Don attended Saint Louis University, as an Ignatian Scholar, where he earned his degree in Biochemistry, with extended coursework in Mathematics and French.

In between his summers at a recognized Midwest firm, Don worked at a large international law firm that is considered the largest law firm in the world, where he performed IP portfolio due diligence to help close an M&A deal totaling US $107M. Don has assisted in closing US $500M in M&A deals, ranging from the sale of a famous VoIP to an international cyber security company.

Based on his background in intellectual property, mergers & acquisitions, construction, and biochemistry, Don can assist clients on a larger scale making sure that their company or brand is protected at whatever phase they are in.

In his spare time, Don enjoys hanging out with family and friends, playing/watching hockey, cycling, golfing, going to the gym, and catching up on any new anime/manga.