Robert P. Greenspoon

Robert P. Greenspoon

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Robert Greenspoon is a founding member of Flachsbart & Greenspoon, LLC. He is a registered patent attorney who concentrates his practice in the litigation, trial and appeal of patent and other complex cases. Rare among lawyers, his practice spans the entire breadth of patent acquisition and litigation. He works with inventors to file new patent applications, defends those inventions in all types of Patent Office proceedings (including PTAB challenges), tries patent cases in the courts, argues for appellants and appellees in patent appeals at the United States Court of Appeals for the Federal Circuit, and finally brings and defends patent proceedings in the United States Supreme Court.

In February 2011, Mr. Greenspoon helped win a patent jury trial for a first-tier automotive supplier client against its direct competitor, performing most of the direct and cross examinations for his side. Between 2014 and 2016, Mr. Greenspoon accumulated numerous permanent injunctions and money judgments against overseas infringers of intellectual property protecting a client's award winning hair care product line.

Mr. Greenspoon has argued numerous cases before the Court of Appeals for the Federal Circuit. Since co-founding the Firm, he argued the winning appeals in D’Agostino v. MasterCard Int’l Inc. (Federal Circuit, Appeal No. 2016-1592), Medtronic v. LifePort Sciences (Federal Circuit, Appeal No. 15-1862, 2016), Computer Software Protection v. Adobe Systems, Inc. (Federal Circuit, Appeal No. 15-1608, 2016), Zayed v. Associated Bank, 779 F.3d 727 (8th Cir. 2015), 1st Media, LLC v. Electronic Arts, Inc., et. al., 694 F.3d 1367 (Fed. Cir. 2012), HyperPhrase v. Google (Federal Circuit, Appeal No. 2007-1125, 2007), and 1st Technology v. Bodog (Federal Circuit, Appeal No. 2008-1132, 2008). At 29 years old, he became possibly the youngest attorney to argue successfully for a patentee-appellant in a multimillion-dollar patent case, in IMS Technology, Inc. v. Haas Automation, Inc., 206 F.3d 1422 (Fed. Cir. 2000).

Mr. Greenspoon also served as a judicial law clerk to the Honorable Brian Barnett Duff of the United States District Court for the Northern District of Illinois. He co-authored "Are Patent Trolls Really Undermining the Patent System?" in the September/October 2006 issue of IP Litigator, "Obviousness after KSR v. Teleflex: A Private Practice Perspective," in the August/September 2007 issue of Intellectual Asset Management Magazine, reprinted in the July/August 2007 issue of IP Litigator, and authored "Is the United States Finally Ready for a Patent Small Claims Court?" in the Winter 2009 volume of the Minnesota Journal of Law, Science and Technology. The Columbia Science and Technology Law Review published his co-authored article "Don't Assume a Can Opener: Confronting Patent Economic Theory with Licensing and Enforcement Reality" in June 2011. Mr. Greenspoon also regularly contributes to the IPWatchdog blog to write on patent policy.


Mr. Greenspoon obtained his A.B. degree in Physics and in the Philosophy of Science from the University of Chicago. He then pursued his legal education at the University of Michigan, where he received his J.D.