Christine Yun Sauer



Christine Yun Sauer focuses her practice on intellectual property litigation and patent office trials. Ms. Yun Sauer represents plaintiffs and defendants ranging from individual inventors to Fortune 500 companies across a vast range of technologies. For example, Ms. Yun Sauer has handled cases involving semiconductor fabrication and packaging, hearing aids, contact lenses, hemostatic powders, DNA sequencing, Ethernet technology, and GPS-related mobile communications technology. Ms. Yun Sauer has handled cases in numerous venues across the country, including courts that handle large numbers of patent cases like the Eastern District of Texas, Northern District of California, Northern District of Illinois, and District of Minnesota and including jury trial experience in complex, multi-million dollar patent litigations.

Additionally, Ms. Yun Sauer has experience analyzing and valuating the economic impact of patented technologies.

Prior to joining Robins Kaplan LLP, Ms. Yun Sauer served in the following roles:  Judicial Extern to the Honorable Ann D. Montgomery, U.S. District Court, Minnesota (Fall 2009); Judicial Extern to the Honorable Mark S. Wernick, Hennepin County District Court (Spring 2009); Legal Intern, Case Western Reserve University: Milton Kramer Law Clinic (2005-2007); Legal Intern, Office of the Washington, D.C. Attorney General: Child Protection Services (2005).


Promega Corporation v. Applied Biosystems, LLC, Life Technologies Corporation, and California Institute of Technology: Judge Richard A. Posner ruled in favor of our client, Promega Corporation, in a suit that it initiated against one of its competitors. In an opinion dated June 12, 2013 from the U.S. District Court for the Northern District of Illinois, Judge Posner ruled that certain claims of U.S. Patent No. RE43,096, asserted against Promega, are invalid. Promega prevailed in its arguments that the claims of the '096 patent were invalid due to the breadth of the claim constructions that Defendants sought and obtained. Certain asserted claims were invalid for lack of written description support. While the patent describes an improvement to DNA sequencing, the breadth of the claims encompassed technologies that Caltech did not invent, including the PCR-based methods on which Promega's accused products are based. The asserted claims were additionally invalid as anticipated or obvious in view of the prior art, including a prior art patent to Caltech, which expired years ago. Judge Posner also found certain claims invalid for obviousness type double patenting. Defendants appealed various aspects of Judge Posner’s decision and the judgment. Six days after oral argument, the Federal Circuit summarily affirmed the judgment, awarding Promega a complete victory in the case.

U.S. Ethernet Innovations v. Digi International, Inc. et al.: Defense counsel for Digi International, Inc. in a patent infringement action in the Eastern District of Texas concerning Ethernet technology. Resolved on confidential terms prior to litigation.

Represented one of the world leading hearing aid manufacturers in patent litigation in the Eastern District of Texas and the District of Minnesota.  The case involved technology related to adjustable null placement.  A settlement was reached at a very early stage in the case.

Medafor v. Hemostasis: Represented Medafor in a patent enforcement action involving hemostatic powder technology.

Trial counsel for the Guardian ad Litem of a child in In re A.M.C.  Following a three-day trial a district court granted the Guardian’s petition to terminate the parental rights of the parents' and place the child up for adoption. 

Other cases include trial experience to jury verdicts in complex, multi-million dollar patent litigation in multiple forums. Technologies include medical devices and computer hardware and software.

Represented Xerox in the defense of a patent litigation lawsuit brought by U.S. Ethernet Innovations in the United States District Court for the Eastern District of Texas.  The case settled after Xerox filed summary judgment and Daubert motions.

Chambers Diversity & Inclusion Shortlisted North America 2020
Super Lawyers 2018
  • Named a “Northern California Rising Star,” Super Lawyers (2018-2020)
  • Named a "Minnesota Rising Star," Super Lawyers (2015-2016)
  • Recipient of the Hennepin County Bar Association’s 2015 Diversity Award, which recognizes a commitment towards increasing diversity in the legal profession.
  • Named a “North Star Lawyer” by the Minnesota State Bar Association for providing at least 50 hours of pro bono legal services (2013, 2015)
  • HCBA Board of Directors, Board Member
  • HCBA Diversity and Inclusion Committee, Co-Chair
  • HCBA Minority Clerkship Program, Chair
  • Everybody Wins! Minnesota Reading Program, Volunteer
Bar Admissions
  • California
  • Minnesota
  • U.S. District Court, Minnesota
  • U.S. District Court, Eastern District of Texas
  • U.S. Patent and Trademark Office
Spoken Languages
  • French
  • Korean
  • University of Minnesota Law School, J.D., cum laude (2010); Minnesota Journal of Law, Science & Technology, Executive Editor (2009-2010) and Staff Member (2008-2009)
  • Case Western Reserve University, B.A. in Chemistry and Political Science, magna cum laude (2007)
Professional Associations
  • Federal Bar Association
  • Leadership Council on Legal Diversity, Fellow (2018)
  • Hennepin County Bar Association
  • Minnesota State Bar Association
  • Leaders of Color: The Changing Landscape
    Women in Legal and Corporate Leadership Summit, San Francisco, California (March 4, 2020)
  • Standard-Essential Patents: Navigating FRAND and Creating Value from SEP Portfolios
    Webinar, Robins Kaplan LLP, Minneapolis, Minnesota (February 13, 2020)
  • Patent Strategies Through a Trial Lawyers Lens
    Webinar, In-house presentation before 50 attorneys in patent litigation, licensing, and patent prosecution (August 15, 2019)
  • WesternGeco International Patent Damages and Beyond
    2018 Midwest IP Institute, Minneapolis, Minnesota (September 28, 2018)
  • Patent v Trade Secret Protection
    AccessMCLE, Webinar (May 24, 2017)
  • Strategic Decision Making in Appellate Practice
    CLE, Morristown, New Jersey (October 20, 2014)
  • Strategic Decision Making in Appellate Practice
    University of Minnesota Law School, Minneapolis, Minnesota (February 24, 2014)
March 4, 2020
Women in Legal and Corporate Leadership Summit
Women in Legal and Corporate Leadership Summit
San Francisco, CA
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