Hanley, Flight & Zimmerman (HFZ) is a boutique Intellectual Property law firm located in the heart of Chicago, specializing in United States and foreign patent prosecution and patent counseling. Our team of practitioners includes many individuals having years of industry experience as engineers and inventors prior to becoming patent attorneys. Our patent team also includes patent agents and engineers, many who have received advanced degrees in mechanical, electrical, computer and biomedical engineering. HFZ provides expert, high-value patent prosecution and counseling services to numerous companies from very diverse technological industries. In fact, 5 of the top 25 companies in the Fortune 500 currently look to HFZ for patent representation. HFZ's main office is located in downtown Chicago and has 45 + employees. There is also a satellite office located in Boulder, Colorado.