William C. Yarbrough, J.D., Pharm.D.

William (Trey) Yarbrough is an Attorney at Kearney, McWilliams & Davis, PLLC.  He is a USPTO Registered Patent Attorney and practices intellectual property law with a focus on patent prosecution and trademark registration.  He studied microbiology and immunology at the University of Arkansas, Fayetteville where he received his Bachelor of Arts degree in Microbiology.  He received his Doctor of Pharmacy at the University of Arkansas for Medical Sciences, Little Rock in 1999 and his J.D. from Santa Clara University, Santa Clara, California in 2005.

Dr. Yarbrough has practiced Pharmacy for over 17 years and has held Pharmacy licenses in Arkansas, California and Texas.  As a solo practitioner he has worked in such varied fields as mechanical devices, medical technology, oil and gas, and commercial and recreational fishing industries.  Additionally, he has served as an adjunct Pharmacy Law Professor for the University of Houston College of Pharmacy since 2011 and has functioned as course co-coordinator since 2017.

William Yarbrough is licensed to practice Pharmacy in Arkansas and Texas.  He is licensed to practice Law in Texas and before the United States Patent and Trademark Office.  He is based in the Houston, Texas, office for Kearney, McWilliams & Davis, PLLC.



  • Yarbrough Law Firm: Owner, Managing Attorney
  • University of Houston College of Pharmacy: Co-Coordinator, Pharmacy Law Course
  • Pharmacist: Walgreens, Wal-mart