Guy Ruttenberg

Professional Profile

Guy Ruttenberg is the founder of Ruttenberg IP Law, A Professional Corporation. A graduate of Harvard Law School and the University of California, Los Angeles (UCLA), Mr. Ruttenberg has represented major corporate clients in federal and state courts, as well as before the international trade commission (ITC). Mr. Ruttenberg’s practice focuses primarily on patent litigation matters and other areas of intellectual property and counseling. Before starting Ruttenberg IP Law, A Professional Corporation, Mr. Ruttenberg worked for 12 years (including 7 years as a partner) at the international law firm of Kirkland & Ellis LLP. Mr. Ruttenberg also spent six months as a visiting attorney in Beijing at the Chinese law firm of Broad & Bright and one year as an exchange attorney in Tokyo at the Japanese law firm of Nagashima Ohno & Tsunematsu. A frequent lecturer in the area of transnational intellectual property litigation, Mr. Ruttenberg is a native speaker of English and Hebrew, with a basic working knowledge of German and Japanese.

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Harvard Law School, J.D., 1999
  • cum laude
  • Harvard Legal Aid Bureau
  • Harvard Journal on Legislation, Supervising Editor
University of California, Los Angeles, B.A., Political Science and History, 1996
  • summa cum laude

Prior Experience

  • Kirkland & Ellis LLP, Los Angeles, California, Oct. 2000 – Oct. 2012
  • Broad & Bright Law Firm, Beijing, China, Feb. – Aug. 2005 (Visiting attorney)
  • Nagashima Ohno & Tsunematsu, Tokyo, Japan, Jan. – Dec. 2004 (Visiting attorney)
  • Judicial Clerk to the Honorable Chief Justice Warren Matthews, Alaska Supreme Court, Sept. 1999 – Sept. 2000


    • California Supreme Court
    • Federal Circuit
    • Ninth Circuit
    • Central District of California
    • Northern District of California
    • Southern District of California
    • Eastern District of California
    • Northern District of Illinois
    • Western District of Texas
    • District of Colorado

Representative Experience

Abbott Diabetes Care v. DexCom, Inc.
Represented Abbott Diabetes in asserting seven patents relating to blood glucose meters; replaced national firm as lead counsel; successfully moved to lift stay on litigation; asserted additional patent; negotiated favorable settlement for client.

j2 Global v. Mitel
Represented j2 Global in asserting its ONEBOX® trademarks; obtained stipulated permanent injunction; negotiated favorable settlement for client.

Fresh Patch, LLC v. DoggieLawn, LLC
Defended pet toilet supplier against competitor’s allegations of patent infringement; obtained partial summary judgment on non-infringement; developed extensive counterclaims; negotiated favorable settlement for client.

PCT et al. v. EZconn et al.
Represented Taiwanese clients against various tort and contract claims relating to alleged misappropriation of technology; successfully defeated Plaintiffs’ motion for jurisdictional discovery; obtained dismissal for lack of personal jurisdiction.

Northpoint Technology v. DIRECTV
Successfully defended DIRECTV in patent infringement action relating to satellite telecommunications in the Western District of Texas. Obtained full defense in favor of DIRECTV by invalidating the Plaintiff’s patent at the summary judgment stage. Judgment was affirmed on appeal before the Federal Circuit.

Solvay v. Honeywell
Successfully defended Honeywell in patent infringement lawsuit relating to foam blowing agents. Obtained fully favorable defense verdict invalidating the Plaintiff’s patent on three independent grounds. Successfully defended the jury verdict in post-trial motions. Case is presently on appeal.

Level 3 Communications v. Limelight
Part of a team that successfully defended Limelight in patent infringement litigation involving content delivery networks. Obtained fully favorable defense verdict from jury in the Eastern District of Virginia. Successfully defended verdict on post-trial motions and on appeal before the Federal Circuit.

AWR Corp. v. ZTE
Represented AWR in software piracy litigation asserting claims for breach of contract and copyright infringement against Chinese telecommunications company. Obtained summary judgment of liability on breach of contract claim. Case settled favorably on the eve of trial.

Mallinckrodt v. E-Z-EM
Represented Covidien/Mallinckrodt in two patent infringement actions, one in Eastern District of Texas, the other in District of Delaware, involving medical equipment. Second chaired jury trial before Judge John Ward in Marshall, TX. Successfully opposed multiple summary judgment motions brought by Defendants. Case settled favorably hours before closing arguments.

Gemstar v. Digeo
Represented Digeo against Gemstar’s allegations of patent infringement relating to interactive programming guide technology, and in asserting antitrust claims challenging Gemstar’s licensing practices. Case settled favorably after Digeo submitted summary judgment motions.

Wi-LAN v. Intel
Represented Intel in two patent infringement actions, one in Eastern District of Texas, the other in Northern District of California, involving WiFi and WiMAX telecommunications technology. Coordinated damages strategy for Intel and approximately twenty co-Defendants in the EDTX matter. Case settled favorably on the eve of trial.

Cadent, Ltd. v. 3M Unitek Corp.
Represented 3M in breach of contract and inventorship litigation involving software patents related to orthodontic treatment. Obtained favorable settlement for client.

Zenith Electronics Corp. v. Sichuan Changhong Electric Co., Ltd.
Represented Zenith in suit asserting Zenith’s television tuner patents against Chinese television importer.

D.R.I.P., Inc. v. R.M. Wade & Co.
Represented D.R.I.P. in suit alleging breach of licensing agreement and infringement of pulsating sprinkler patent. Successfully dismissed Wade’s counterclaims for breach of contract, and defeated Wade’s motion to transfer venue. Obtained favorable settlement for client after filing summary judgment motions.

Zenith Electronics Corp. v. Konka Group Co. Ltd.
Represented Zenith in suit asserting Zenith’s television tuner patents against Chinese television importer.

Funai Electric Co., Ltd. v. Zenith Electronics Corp.
Represented Zenith in a suit involving a challenge to Zenith’s television tuner patents and counterclaims by Zenith for infringement of the patents.

Razor USA LLC v. Asa Products, Inc. et al.
Represented Razor in a suit asserting Razor’s brake patent, trademark and trade dress against various infringing importers. Obtained temporary restraining orders and preliminary injunctions against multiple defendants. Defeated defendants’ interlocutory appeals to the Federal Circuit. Cases settled favorably for client.

j2 Global Inc. et al. v. et al., No. 2:2013-cv-05353 (C.D. Cal.)
Mr. Ruttenberg represented the plaintiff (j2 Global) in a dispute involving claims for fraud, breach of contract, trademark infringement and copyright infringement, as well as alter ego allegations, against various individuals and entities operating on four different continents. Mr. Ruttenberg and his team were able to show that the defendants had set up various alter-ego operations in the Philippines, Columbia, Cayman Islands and elsewhere—all in an attempt to evade their obligations and defraud the intellectual property owner. The case settled after Mr. Ruttenberg and his team obtained an $18M judgement and permanent injunction against the various alter egos.

Drop Stop LLC v. Zhu et al., No. 2:16-cv-07916 (C.D. Cal.)
Mr. Ruttenberg represented the patentholder against various Chinese infringers who were selling knock-off products via Amazon and other online portals. Through extensive pre-litigation diligence, Mr. Ruttenberg and his team were able to identify the true names and addresses of the various infringers, as well as various US-based affiliates. Ultimately, Drop Stop obtained an injunction against further infringement, money damages, and an award of attorneys’ fees in the amount of $600,000—which was affirmed by the Federal Circuit Court of Appeals.

Cadence Design Systems, Inc. v. Pounce Consulting, Inc. et al., No. 5:2017cv04732 (N.D. Cal.)
Mr. Ruttenberg represents Cadence (a software company) in a software piracy case against Mexican defendants. Through pre-litigation diligence and discovery, Mr. Ruttenberg and his team traced the unlawful usage to a Mexican defendant and its US affiliate. The Ruttenberg IP Law team was also able to obtain extensive evidence confirming that the various entities actually operate as alter egos of one another.

Hullinger et al. v. Anand et al., No. 15-cv-07185 (C.D. Cal.)
Mr. Ruttenberg represented the plaintiffs (two entrepreneurs and their start-up) in asserting claims that their former partner misappropriated their technology to start a new competing company. Through extensive diligence and discovery, Mr. Ruttenberg and his team developed extensive evidence for supporting allegations of fraud, trade secret misappropriation and breach of fiduciary duties, among other things. The case settled shortly before trial.

Updateme Inc. v. Axel Springer SE et al., No 5:2017cv05054 (N.D. Cal.)
Mr. Ruttenberg represented the plaintiff Updateme in cross-border litigation asserting claims for fraud, breach of implied contract and trademark infringement, among others, involving allegations that the defendants misappropriated Updateme’s mobile app. The litigation stemmed from allegations that the defendants solicited Updateme (a media start-up) to pitch its model for a prospective business partnership and, instead, used the information to create its own competing app. The litigation settled after Mr. Ruttenberg and his team secured several favorable rulings in their client’s favor.