In representing our clients, we offer a team oriented approach. The unique talents and experience of each team member allow us to provide responsive and quality services.


Our team is available to assist in the preparation, filing and prosecution of patent applications in both the United States and foreign jurisdictions. Generally, after an initial consultation, we can advise you on a recommended course of action with respect to protecting and creating an asset out of your innovation. Please contact us for further information.


Your mark is a valuable and tangible business asset that should be protected. Our team is experienced in the trademark filing process, as well as representation before the trademark office and in trademark disputes. Please contact us for further information regarding trademarks.


Protecting your creativity and original works is an important consideration when thinking about your intellectual property rights. Please contact us for further information.

Best Of Fairfield County 2016

Ziegler IP Law Group LLC has been named one of Fairfield Counties best in 2016. Click here to learn more.

About Us

Geza C. Ziegler, JR.

Patent Attorney, Registered to practice before the United States Patent and Trademark Office

J.D. - Quinnipiac University M.B.A. - Sacred Heart University B.S.E.E., Electrical Engineering - University of Bridgeport

Geza concentrates his practice in patent and trademark matters. He has extensive experience drafting and prosecuting patent applications, mainly in the electrical, computer, business method and mechanical arts. He is also involved with developing patent opinions and post grant proceedings, and in particular, ex parte and inter partes reexamination proceedings. With respect to trademarks, Geza is involved the trademark filing and registration process, as well as opposition and cancellation proceedings.

Joseph V. Gamberdell, JR.

Patent Attorney

J.D. - Quinnipiac University B.S - Electrical Engineering, University of Bridgeport, Bridgeport CT

Patents and Trademarks; extensive experience in application preparation and prosecution; IP portfolio management.

Technical Expertise
Electronics; transducers; electro-mechanical devices; software and applications; computers; medical scanning and diagnostic equipment; analog and digital test equipment; networks; chromatography, spectroscopy, thermal analysis and electrophoresis instruments; terrestrial and satellite telecommunications; motors.

Grover F. Fuller, JR.

Patent Attorney (Admitted in NY & MA), Registered to practice before the United States Patent and Trademark Office

J.D. – New England School of Law A.B., Biochemistry - University of Pennsylvania

Grover’s practice focuses on chemical, biochemical and pharmaceutical technologies. He is engaged in all aspects of patent law including drafting and prosecuting patent cases, opinions (patentability, validity, infringement & freedom to operate), international IP law and filing strategies, due diligence and licensing. As a senior patent attorney at Pfizer and counsel to multiple Fortune 500 companies, start-ups and individual inventors, Grover has unique legal, scientific and commercial business skills on U.S. and foreign patent matters.

Kevin Strobel

Patent Agent, Registered to practice before the United States Patent and Trademark Office

M.E., Computer and System Engineering - Rensselaer Polytechnic Institute, Troy, NY B.S., Electrical Engineering and Computer Engineering - University of Connecticut, Storrs, CT

Kevin's experience include thirty years as a design engineer in a wide variety of computer software, data processing, electrical and electromechanical arts, including cryptography, internet security, motion control and semiconductor design. Most recently, Kevin has been drafting and prosecuting patent application in the electrical, computer and electromechanical arts.

Doug Zhang's.

Patent Attorney U.S. District Courts for the Southern and Eastern Districts of New York U.S. Patent and Trademark Office

J.D.--New York Law School, Magna Cum Laude, Law Review Master of Intellectual Property--University of New Hampshire Franklin Pierce School of Law B.S., Mechanical Engineering--Shanghai Jiao Tong University

Doug is a seasoned US intellectual property attorney with a mechanical engineering background and over 33 years of diverse IP experience ranging from boutique IP law firms, general practice law firms, and a Fortune 50 company. His deep domain expertise has been in U.S. and foreign patent, trademark, copyright, and other related intellectual property matters and disputes. While working for the Fortune 50 company, Doug managed patent portfolios for its various businesses, including driving strategic and tactical aspects of IP operation, such as helping patent evaluation boards choose the proper protection for IP assets, educating engineers on IP, supporting business M&A activities, studying competitors’ patents to assess risks, preparing and prosecuting patent applications in diverse technical fields in the US and throughout the world to support the growth strategies of these businesses, and defending patents in oppositions and cancellations.
Doug is fluent in Chinese.