Jeffrey S.Messing (Jeff)


Chicago + 1.312.269.1542

Jeff Messing represents domestic and international companies on a variety of intellectual property matters, with a primary focus on patent litigation in district courts across the country and post-grant proceedings at the United States Patent and Trademark Office (USPTO). Jeff's litigation experience spans a variety of technologies across multiple industries such as telecommunications, electronic circuits, medical devices, child care, and pharmaceuticals. He has experience in all stages of discovery, including working with technical experts, research, and motion practice.

Jeff maintains an active pro bono practice and represents tenants facing eviction. He also has experience in applications, manufacturing, and MEP (mechanical, electrical, and plumbing) engineering gained from working during his undergraduate education.


  • Tineco prevails in ITC patent infringement dispute with Bissell over wet-dry surface cleaning devicesJones Day successfully represented Tineco Intelligent Technology Co., Ltd. as respondent in an ITC Section 337 investigation filed by complainants Bissell Inc. and Bissell Homecare Inc. ("Bissell") relating to wet-dry surface cleaning devices.
  • Riverside acquires Bishops Cuts/ColorJones Day represented The Riverside Company in connection with the acquisition of Bishops Cuts/Color (Bishops), a franchise company that is a leading provider of hair care services with more than 40 locations across the United States.
  • Wybotics secures voluntary dismissal from ITC investigation involving robotic pool cleanersJones Day successfully represented respondent Wybotics Co., Ltd., a manufacturer of robotic pool cleaners, in a Section 337 patent infringement Investigation before the International Trade Commission (ITC).
  • Home Depot wins ITC trial in patent litigation relating to filament LED technologyJones Day successfully defended The Home Depot, Inc. before the International Trade Commission (ITC) against multi-patent litigation asserted by The Regents of the University of California.
  • Ability Opto-Electronics resolves patent infringement dispute relating to computer camera lensesJones Day defended Taiwan-based Ability Opto-Electronics Technology Co., Ltd. in a patent infringement lawsuit filed by its competitor Largan Precision Co., Ltd., in a case relating to optical lens systems for cameras and computers.
  • Itron defeats patent infringement lawsuit relating to data transmission technologyJones Day obtained dismissal of a patent infringement case brought against Itron prior to the exchange of discovery.
  • Lennox secures voluntary dismissal of complaint accusing iComfort S30 Smart Hub system of infringementOn behalf of Lennox Industries Inc., Jones Day obtained voluntary dismissal of a patent infringement lawsuit after identifying strong non-infringement positions.
  • Salvadoran woman and son obtain asylum due to persecution by MS-13 gangJones Day has secured asylum for client G and her minor son, who were threatened by gang members due to their relationship to a police officer.
  • Qualcomm defends Apple's patent infringement claims relating to processor power saving techniquesJones Day defended Qualcomm Incorporated against Apple, Inc.'s allegations that Qualcomm's Snapdragon processors – CPU/GPU/Baseband Modem System on Chip – infringe a number of Apple's patents directed to power saving techniques for use in processors.