Brian D. Ledahl

Los Angeles Office



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  • Columbia Law School (JD, 1996, Harlan Fiske Stone Scholar)
  • Columbia University (BA, 1993, Eisenhower Scholar Athlete Award)

Brian Ledahl is a partner at Russ August & Kabat, where he specializes in intellectual property and litigation with an emphasis on high-technology patent litigation and entertainment litigation. Prior to joining Russ August & Kabat, Mr. Ledahl was a lawyer at Irell & Manella LLP from 1996-2013, where he was a member of the Intellectual Property and Litigation workgroups.

Mr. Ledahl has extensive experience representing clients in complex, high-stakes litigation.  He has represented clients from case inception through both jury and bench trials in numerous federal and state trial courts, before the United States International Trade Commission, and in various arbitral tribunals. Mr. Ledahl has also handled appellate matters before the federal appellate courts for the Federal Circuit and the Ninth Circuit, as well as California appellate courts. Over the course of his career, Mr. Ledahl has helped his clients recover more than $1.5 billion in judgments and settlements. Mr. Ledahl also counsels clients on a variety of business and strategic issues involving intellectual property and related issues.

Mr. Ledahl regularly speaks and writes regarding intellectual property issues. Past engagements have included presentations for the American Intellectual Property Law Association, a joint American Law Institute-American Bar Association Conference on Entertainment Law, and the National Constitution Center, as well as various publications.

Mr. Ledahl has been AV rated by Martindale-Hubell, and was recognized as a Southern California Super Lawyer from 2014-2016 by the publishers of Los Angeles Magazine.

Some of Mr. Ledahl’s representative matters include:

Patent and Technology Matters:

  • In the Matter of Certain Dynamic Random Access Memory and NAND Flash Memory Devices, representing patent holder Intellectual Ventures before the U.S. International Trade Commission in a patent infringement matter against manufacturers of computer memory.
  • Microprocessor Enhancement Corp. v. Texas Instruments, representing Texas Instruments in a patent infringement dispute regarding microprocessor architecture, obtaining summary judgment for Texas Instruments, and handling successful defense of appeal from that judgment.
  • Oklahoma Medical Research Foundation v. Eli Lilly and Company, representing Eli Lilly in a patent infringement and licensing dispute involving a patent asserted against Lilly’s Xigris® medication (for the treatment of severe sepsis).
  • Affymetrix, Inc. – Hyseq and Incyte Litigation, representing Affymetrix in a series of patent lawsuits relating to its GeneChip ® technology for genetic analysis.
  • Northrop Grumman Space & Mission Systems v. Space Exploration Technology, representing Space Exploration Technology (SpaceX) in a trade secret dispute relating to rocket propulsion technology and in a separate antitrust claim against Northrop Grumman.

Entertainment Matters

  • UMG Recordings v. Myspace, v. Grouper Networks, and v. Veoh Networks, representing Universal Music in copyright infringement actions addressing issues of first impression under the Digital Millennium Copyright Act.
  • HLC Properties v. UMG Recordings, representing Universal Music in multiple disputes with heirs of recording artist Bing Crosby over music royalties and distribution rights.
  • Bug Music v. Warner/Chappell Music, representing Bug Music in a dispute over international music publishing rights.
  • TI Beverage Group v. Home Box Office, representing HBO in a trademark dispute relating to a beverage product connected with the original series True Blood.

Before beginning his legal practice, Mr. Ledahl earned his J.D. in 1996 from Columbia Law School where he was a Harlan Fiske Stone Scholar. During law school, Mr. Ledahl served as a judicial extern to the Hon. Sonia Sotomayor. Mr. Ledahl earned his Bachelors Degree in 1993 from Columbia University where he was a member of the 1992 and 1993 NCAA Champion fencing teams and earned the Eisenhower Scholar Athlete Award.