Mr. Charmasson's experience with Intellectual Property law extends over thirty-five years. Henri is an inventor with his name on 15 U.S. patents and an entrepreneur who sits on the board of several small business corporations. In his early engineering career, Henri designed computer hardware. He has authored several articles and delivered lectures on patent, copyright, trademark and trade secret topics, and is the co-author of Patents, Copyrights & Trademarks for Dummies.

89_John_Crop_tiltEducation: Thomas Jefferson Law School, J.D. University of Alaska - Fairbanks San Diego State University B.S., Applied Mathematics Admitted 1997 - State Bar of California Admitted U.S. District Court, Southern District of California Registered to Practice Before the United States Patent and rademark Office Areas of Practice Patents, Trademarks and other Intellectual Property causes After admission to the California State Bar in 1997, Mr. Buchaca joined Henri Charmasson in private practice. He is the co-author of Patents, Trademarks & Copyrights for Dummies. Prior to practicing law, John worked in ocean acoustics analysis and software engineering.

89_Rob_Best1_Brur1Education: University of San Diego Law School, J.D. University of San Diego, B.A. Admitted 1987 - State Bar of California Admitted U.S. District Court, Southern District of California

Honors: Graduated with Honors from the University of San Diego Judge Pro Tem, San Diego County Superior Court Super Lawyers, 2008 & 2009

Areas of Practice:
Personal Injury Business Litigation General Civil Litigation Unlawful Business Practices Employment Litigation Insurance Defense Intellectual Property Litigation Trademark and Copyright Prosecution and Enforcement Intellectual Property Contract Drafting and Negotiations After admission to the bar in 1987, Rob worked as a trial lawyer for a large civil litigation firm, but went into private practice in 1990. In 2004, Mr. Leach merged his firm with Charmasson & Buchaca. He has successfully represented individuals, small businesses and large companies for over 20 years. Mr. Leach works primarily as a civil litigation trial attorney, but also crafts and reviews contracts and obtains trademark and copyright registrations.

A lifelong resident of San Diego, Rob remains involved in his community, serving on the Board of Directors at St. Augustine High School, currently as Chairperson.


  • Robert H. McKinney School of Law, J.D.
  • Purdue University - B.S., Chemical Engineering

Professional Licenses:

  • California State Bar - Bar Number: 331967 (2020, current)
  • Patent Attorney - Registration: 78,732 (2020, current)

Areas of Practice: Prior to joining Charmasson, Buchaca and Leach, Ben worked as an Associate Attorney at a local law office. Originally from Indianapolis, Indiana he worked as a Patent Consultant, guiding clients through the patent process, before moving to San Diego. Ben was an Industrial Engineer at UPS as well.