Pfeiffer, Kelly K.

Of Counsel


McGeorge School of Law
University of the Pacific


The State Bar of California
Admitted since 2002
State Bar No. 223468

Pfeiffer, Kelly K.

Of Counsel

Kelly K. Pfeiffer serves as Of Counsel to Fortis LLP.

Ms. Pfeiffer exclusively practices Intellectual Property Law, concentrating on trademark litigation, brand counseling, trademark prosecution and brand maintenance for clients with domestic and international portfolios.

Ms. Pfeiffer has significant experience in managing matters before the United States Patent and Trademark Office (USPTO). She has prosecuted countless trademark applications for brands in a wide variety of goods and services and has successfully litigated numerous oppositions and cancellation proceedings before the Trademark Trial and Appeal Board (TTAB).

Within the last few years, Ms. Pfeiffer has expanded her practice to include appellate work in the Ninth and Federal Circuits on cases addressing ground-breaking trademark and first amendment issues. She has also co-authored multiple U.S. Supreme Court and Court of Appeals amicus curie briefs on behalf of clients with stakes in the outcomes of high-profile trademark cases.

A Southern California native, Ms. Pfeiffer earned her undergraduate degree from the University of Southern California in 1999 through the Annenberg School of Communication, while also earning minors in Journalism and Anthropology. She received her J.D. degree from the University of the Pacific McGeorge School of Law with a concentration in Intellectual Property and the LLM degree in Intellectual Property from Santa Clara University School of Law. Ms. Pfeiffer is admitted to practice in California, the Ninth and Federal Circuit Courts of Appeals, and the Supreme Court of the United States.

In her spare time, Ms. Pfeiffer enjoys running marathons, kickboxing, and is extremely involved in her community. Ms. She and her daughter are members of the Monarch Chapter of the National Charity League, and she serves on its Executive Board as the Recording Secretary. Ms. Pfeiffer also serves on the Executive Boards of the Santa Margarita Catholic High School’s Mothers Club and the Orange County Boy Scouts of America for Troop 774. She is also a founding member of the South Orange County Coastal Chapter of the National League of Young Men (of which she and her son are current members) and serves on its Executive Board as its Vice President of Philanthropy. Ms. Pfeiffer is also an active member of the Orange County Alumni Association of Kappa Kappa Gamma and the Orange County Bar Association.