Greenfield Patents Lawyers

Grady K. Bergen is a partner at Griggs Bergen LLP, a law firm specializing in intellectual property with offices in Dallas, Texas. He is a registered patent attorney with the U.S. Patent and Trademark Office and is licensed to practice in Texas and Missouri. Mr. Bergen earned his Juris Doctorate from Baylor University School of Law in 1992, and holds a B.S. in Chemical Engineering from the University of Oklahoma, completed in 1988. His legal practice focuses on patents, trademarks, copyrights, and related intellectual property matters. With a background in engineering, Mr. Bergen is experienced in handling cases across various technology...

David Marcus has spent nearly three decades representing entrepreneurs and business owners in complex cases involving everything from the breach of an asset purchase agreement, to the infringement of a patent and copyright, to an allegedly defective product, to the improper management of a brokerage account. After getting his start at a large law firm, Mr. Marcus went on to become a partner at a boutique litigation firm before founding his own firm about a decade into his practice. Mr. Marcus has tried numerous cases to jury verdict in state and federal courts, and also handled arbitrations administered...

Mr. Crawford has extensive experience and expertise preparing and prosecuting patent applications in the U.S. and throughout the world. He conducts freedom-to-operate, infringement and validity studies, prepares and negotiates licenses and other agreements related to intellectual property, and prepares and prosecutes trademark and copyright registrations. Mr. Crawford has litigated matters locally and across the country, he is an authority on design patent protection, and he regularly works for entities ranging from individuals and start-up companies to established national corporations and multi-national conglomerates. Mr. Crawford has provided patent services in diverse technologies, including medical devices and surgical instruments, industrial processing...

An Eagle Scout and Army brat, Chuck has lived in St. Louis for over twelve years. After earning a Bachelor of Science in Civil Engineering degree from Notre Dame in 1990, Chuck served in Germany with the US Army engineers. Working as an engineer in Kansas City, he earned the professional engineer license in MO and three other states. Chuck worked on the Matt Blunt for Secretary of State campaign for Gravois township. Drawn east, he graduated from St. Louis University law school in 2001 with a Juris Doctor degree. Chuck ran for State Rep. in 2002 for district 66,...

Bob is a biologist with undergraduate and graduate training in endocrinology from Virginia Tech. Bob spent over 10 years in the biotech and pharmaceutical industries working with respiratory drugs, in-vitro diagnostics, and associated methods and instrumentation. Earlier this decade, while working with business development on matters related to acquisition of new IP as well as protection of existing IP, Bob became very interested to pursue intellectual property law in a personal and intimate capacity. Bob graduated from SLU Law in May 2016 and was sworn in to the Missouri Bar on September 30th, 2016.

Dennis Donahue III is an experienced, highly effective intellectual property attorney, manager, and business advisor, with expertise in all areas of intellectual property law both in corporate and private practice. Clients served include multi-billion dollar international retailer, aerospace manufacturing giant, aerospace subassembly supplier, secure communications start-up company and internet entrepreneurs. After more than a decade of large firm practice, Donahue says the formation of DD&A allows him to work more closely with smaller inventors and entrepreneurs who may not otherwise have a cost effective way to protect their ideas and grow in a tough economy. Donahue believes it's...

Dr. Bretton began his professional life as a biomedical researcher. After receiving his PhD, he researched the cellular and biochemical properties of the extracellular matrix of cartridge, skin, cornea and lens. He quickly discovered that he preferred applied science. While working in R&D at Storz Ophthalmic Company in St. Louis, he invented a surgical instrument and a biological agent to prevent the reoccurrence of cataracts. He enjoyed the patent prosecution process and after a change in corporate ownership, he went on to law school. Since Law School, he has worked in a large law firm as...

SEAN T. BRADLEY is registered to practice before the United States Patent and Trademark Office, and is admitted to the Kansas Bar, the Missouri Bar, and the U.S. Court of Appeals for the Eighth and Tenth Circuits. He has served two terms as Chair of the Patent, Trademark and Copyright Committee of the Kansas City Metropolitan Bar Association. Mr. Bradley’s practice includes patent and trademark searches, preparing and prosecuting patent applications, both in the US and internationally, and preparing and prosecuting trademark and copyright applications for registration. Additional services include preparing confidentiality or non-disclosure agreements, assignments, and license agreements,...