Our People
Nicole Ballew Chang, Ph.D.
Nicole Ballew Chang is a patent agent with Umberg Zipser LLP where she focuses her practice on patent prosecution in biotechnology, life sciences, and chemical arts. Nicole’s educational and professional background serves clients well in her role on the Umberg Zipser team. […]
Brent S. Colasurdo
Brent S. Colasurdo is an associate with Umberg Zipser where he focuses his practice on complex commercial litigation. […]
Ryan S. Dean
Ryan S. Dean specializes in global patent and trademark prosecution for clients of all sizes, and focuses primarily in the areas of mechanical and aerospace engineering, process engineering, household and consumer products, medical devices, and fluid conditioning systems. […]
Martin Fessenmaier, Ph.D.
Martin Fessenmaier, Ph.D. has almost two decades of experience in domestic and International patent prosecution, predominantly working with clients in the fields of biochemistry and molecular biology, bioinformatics, medical devices, pharmaceutical chemistry, organic chemistry, electrochemistry, chemical engineering, and general mechanical arts. […]
Mark A. Finkelstein
Mark Finkelstein has more than two decades of intellectual property and complex litigation experience where he advises clients on matters involving patent, copyright, trademark, and trade dress infringement, as well as misuse of trade secrets, unfair competition, and more. […]
Scott B. Garner
Scott B. Garner represents clients in complex business litigation matters. Along with his focus on professional liability disputes, Scott’s practice extends to securities litigation, intellectual property litigation, corporate governance, hospital and healthcare law, and toxic tort matters. […]
Leah A. Hamlin
Leah A. Hamlin is an associate at Umberg Zipser where she focuses her practice in the areas of complex commercial litigation, intellectual property disputes and employment litigation. […]
Priti Phukan, Ph. D.
Priti Phukan concentrates her practice on patent and trademark prosecution across various technology industries, including chemistry, life sciences, diagnostics, medical devices, and mechanical engineering. […]
Carole E. Reagan
Carole E. Reagan’s practice focuses on intellectual property and complex commercial litigation. She has successfully represented business clients across a diverse array of industries, as well as prominent individual clients, in trademark, trade secret, and copyright litigation, consumer class actions, contract and real estate disputes, […]
Todd W. Smith
Todd Smith’s practice focuses on complex business litigation in state and federal courts. He represents companies and individuals in consumer and securities class actions, shareholder and derivative litigation, breach of contract and fiduciary duty claims, financial services litigation, real estate disputes, protection of intellectual property rights,and unfair competition claims. […]
Adina W. Stowell
Adina Stowell specializes in complex litigation involving corporate, commercial, trade secret, and real estate disputes in both state and federal courts. She has also represented clients in a number of consumer class actions in the technology, consumer product, and financial services industries involving unfair competition, false advertising, breach of warranty, and product liability related claims. […]
Mei Tsang
Mei Tsang has an international intellectual property practice focused on helping clients formulate their IP strategy, and shepherding their IP through various business cycles to achieve their business goals worldwide. Mei has substantial experience in patent and trademark portfolio development, and in all aspects of IP enforcement, including negotiation, licensing, and litigation at various courts at the federal, state, and administrative levels. […]
Thomas J. Umberg
Thomas J. Umberg has extensive trial experience in both federal and state courts and has been recognized as a “Super Lawyer” for Southern California, an honor limited to only 5% of Southern California lawyers. He has also been selected as one of the “Best Lawyers in America®” in commercial litigation. […]
Vikki Vander Woude
Vikki Vander Woude is a partner at Umberg Zipser LLP, in Irvine, California, and has nearly 25 years of experience in litigation and alternative dispute resolution. Vikki has a broad and diverse professional background having worked in large and small law firms, as in-house counsel, and as a research attorney for the courts, which gives her a unique perspective and skill set that is of immeasurable benefit to clients. […]
Dean J. Zipser
Dean J. Zipser is a recognized leader in the Orange County legal community, having served as President of the Orange County Bar Association and the Association of Business Trial Lawyers-Orange County Chapter. In 2003, Dean received the Jurisprudence Award given by the Anti-Defamation League, which recognizes individual commitment to the highest ideals […]