Printout from Pearl Cohen Zedek Latzer Baratz


David Loewenstein is a Partner in the Patent Litigation and Post Grant Proceedings Group, as well as the Copyright, Design and Trademark Litigation Group at Pearl Cohen's New York office. He has over 25 years of patent and intellectual property litigation experience on all levels, from trial to appeal, and he has been involved in a wide array of technologies for numerous multinational companies, including: Ford Motor Company (electronic engine controls); Procter & Gamble (computer software); Varian Associates (Fourier Transform NMR instruments); Fujitsu (cell phone filters and other technology); C.R. Bard (medical devices); W.L. Gore (variety of Gore-Tex products); Bombardier, Inc. (patent case concerning 33 patents related to personal watercraft); Boehringer Ingelheim Corp. (Oxycontin litigation); Coulter (monoclonal antibodies and flow cytometers); and Given Imaging (imaging capsules). David has been selected as a New York Metro Super Lawyer for 2018 (2013-2019) and rated by Martindale Hubbell as AV Preeminent® (4.9 out of 5)

David has worked with both Xerox and British Telecom (VOIP) on various litigation and pre-litigation matters, and was also a member of the trial team in the historic Polaroid v. Kodak damages trial.  His reported cases include:

Agostini v. Felton, 521 U.S. 203 (1997);

Young v. Lumenis, Inc., 492 F.3d 1336 (Fed. Cir. 2007);

Horphag Research Ltd. v. Consac Industries, Inc., 1997 WESTLAW 196744, 42 U.S.P.Q.2d 1567 (Fed. Cir. 1997);

Gentex Corp. v. Donnelly Corp., 69 F.3d 527, 36 U.S.P.Q.2d 1667 (Fed. Cir. 1995);

Edgewell Personal Care Brands, LLC v. Albaad Massuot Yitzhak, Ltd. et al, No. 1:2015cv01188 - Document 89 (D. Del. 2018).

M2M Solutions v. Motorola and Telit, 2016 U.S. Dist. LEXIS 22944 (D. Del. Feb. 25 2016);

M2M Solutions v. Motorola and Telit, 2016 U.S. Dist. LEXIS 872 (D. Del. Jan 6. 2016);

Mobileye, Inc. v. Picitup Corp., 2013 WL 830837 (S.D.N.Y. 2013); 

WRE-Hol, LLC v. Pharos Sci. & Applications, 2010 U.S. Dist. LEXIS 82570 (W.D. Wash. July 23, 2010);

Immersion Med. Inc. v. Mentice AB, 2009 U.S. Dist. LEXIS 92034 (E.D. Tex. Sept, 29, 2009);

Landmark Graphics Corp. v. Seismic Micro Tech., Inc., 2007 U.S. Dist. LEXIS 6897 (S.D. Tex. Jan. 31, 2007);

Young v. Lumenis, 2005 U.S. Dist. LEXIS 27792, (S.D. Ohio 2005);

Infineon Technologies AG, v. Green Power Technologies Ltd., 2005 U.S. Dist. LEXIS 11877 (D. DC. 2005);

Measurement Computing Corp. v. General Patent Corp. Int'l, 2004 U.S. Dist. LEXIS 2082, (D. Mass. February 10, 2004);

Brown v. 3M, 60 U.S.P.Q.2d 1298 (D. Ariz. 2000);

National Research Development Corp. v. Varian Associates, Inc., 822 F. Supp. 1121 (D. N.J. 1993);

Polaroid Corp. v. Eastman Kodak Co., 16 U.S.P.Q.2d 1481 (D. Mass. 1990); and

Gardner v. Ford Motor Co., 17 U.S.P.Q.2d 1177 (W.D. Wash. 1990).

David's recent representative matters include:

M2M Solutions v. Motorola, Telit (M2M communications)

Datascope, Maquet Cardiovascular v. Teleflex, Arrow (medical device)

Mizuho Orthopedic Systems v. Maquet Cardiovascular (medical device)

Afa Polytek v. Clorox Company, Guala Dispensing (dispensing systems)

Leighton Technologies v. On Track Innovations (RFID, smart cards)

Smarter Agent v. Mobile Card Cast, Goomzee, StreetEasy, Terrostar (mobile real estate applications)

Remote Light v. Galikers and United Dairy (UV water disinfectant) v. Superfish (imaging software)

WRE v. Telmap (GPS software)

Nautilus Neurosciences v. Edict Pharmaceuticals (ANDA litigation)

CardioFocus v. New Star, Trimedyne, Convergent (medical lasers)

Berger v. New York International Enterprises (trademark)

PSB Investissement v. O2 (trademark infringement)

Memory Control Enterprises v. OfficeMax (e-commerce software)

Cutex v. Laboratories Delon (trademark infringement)

Smarttrac v. OTI (RFID cards)

Landmark/Halliburton v. Paradigm (oil exploration software)


  • New York State Bar
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Patent & Trademark Office
  • U.S. District Court, SDNY
  • U.S. District Court, EDNY
  • U.S. Supreme Court
  • U.S. Court of Appeals for the Second Circuit


Fordham Law School, J.D., 1987

Columbia University, M.S., 1984

Tufts University, B.S., 1981


English, French & German

Professional Membership

American Arbitration Association - Mediator and Arbitrator


A Look At Fed. Circ. Induced Infringement Ruling In NuVasive, David Loewenstein and Clyde Shuman, Law360, June 22, 2016.

Patent Litigation in the Eastern District of Texas: Is the Party Over? David Loewenstein and Douglas Gilbert IP Law 360, January 13, 2009.

“Pitfalls In Indemnification Provisions In Intellectual Property Agreements,” les Nouvelles, Journal Of The Licensing Executives Society, September 2002.

Authored a chapter entitled “Patent Opinions” in Intellectual Property Assets in Mergers and Acquisitions (2002).

The Federal Circuit’s En Banc Decision in Johnson & Johnston, Inc. v. R.E. Services, Inc., The New York Law Journal, June 4, 2002.

Recent Federal Circuit Decisions Focus On Defenses, The National Law Journal, April 15, 2002.

A Critical Analysis of the Bard v. M3 Systems Decision, International Legal Strategy (May 2002).

“Dangers in Joint Patent Ownership”, les Nouvelles Journal Of The Licensing Executives Society, vol. XXXII No. 1 (March 1998).

Co-author with Christopher E. Chalsen “Venue Selection For Patent Infringement Actions In The United States,” International Legal Strategies, vol. VI-12 (1997).

Prepared a paper for Herbert F. Schwartz, Esq. entitled "Patent Damages" given at the August 1993 ABA Intellectual Property Law Section Meeting.

"A Ping Pong Playing Robot," Robotics Age, 1983.