About Robert P.
Robert P. Greenspoon took a path to law that began in the sciences. He earned a B.A. in Physics from the University of Chicago in 1989 and completed his J.D. at the University of Michigan Law School in 1992. Those years of study gave him technical training alongside legal education, a combination that would inform the work he pursued after law school.
Early in his career he served as a law clerk to the Honorable Brian Barnett Duff on the United States District Court for the Northern District of Illinois in 1995. That clerkship offered courtroom exposure and a close view of federal practice. The next year he moved into private practice as a shareholder at Niro, Haller & Niro, taking on responsibilities typical of a mid-career litigation and counseling attorney.
Greenspoon registered as a patent lawyer with the United States Patent and Trademark Office. That credential aligns with his academic background in physics and shaped the kinds of matters he accepted. Over time his work encompassed patent-related proceedings and other intellectual property tasks that require both technical and legal judgment.
In 2007 he became a member of Flachsbart & Greenspoon, LLC, joining a firm located in Illinois. His name appears among the firm’s roster and he has maintained ties to the Illinois bar and legal community. Since 2009 he has also taken on a leadership role with the Lawyer Alumni of the College of the University of Chicago as co-chair, a position he continues to hold. That association work connects him to alumni and to younger lawyers with scientific or technical interests.
Colleagues describe Greenspoon as a lawyer whose background in physics informs how he reads patent specifications and technical disclosures. He combines his courtroom experience, gained in part through a federal clerkship, with patent credentialing to advise clients on prosecution and disputes. His career includes decades in firms that handled litigation and intellectual property matters, and he has moved between roles in larger and smaller practices.
As of 2026 he is based at Flachsbart & Greenspoon, LLC in Illinois. He remains a Registered Patent Lawyer with the U.S. Patent and Trademark Office and continues to engage in patent prosecution and related intellectual property work at his current firm.
