About John Paul
John Paul Costello is a licensed attorney admitted to practice law in California. He was admitted to the California State Bar in 1992. His license is currently in active status. Mr. Costello is a member of Costello Law Corporation, a law firm located in Sacramento, California. He has been practicing law for over 33 years, serving clients throughout the Sacramento area and surrounding regions.
Mr. Costello earned his Juris Doctor degree from Georgetown University Law Center in 1991. Prior to law school, he completed his undergraduate education at the University of California at Davis, receiving a Bachelor of Science degree in Biochemistry and Biology in 1986. During his time at Georgetown, he developed a strong foundation in intellectual property law, which has been central to his legal career.
Mr. Costello concentrates his practice in the areas of intellectual property law, including patents, trademarks, copyrights, and trade secrets. He represents individuals and businesses in matters involving patent appeals, patent litigation, patent prosecution, trademark infringement, and copyright infringement. His practice encompasses all stages of litigation, including initial case evaluation, discovery, mediation, settlement negotiations, and trial proceedings in both state and federal courts.
Throughout his career, Mr. Costello has handled cases in the Superior Court of California for the County of Sacramento, the United States District Court for the Eastern District of California, the United States District Court for the Central District of California, and the United States District Court for the Northern District of California. He is also admitted to practice before the U.S. Patent and Trademark Office, allowing him to represent clients in patent and trademark matters before federal agencies. Prior to founding his own firm, he worked as an associate at a mid-size intellectual property firm in Sacramento for several years.
Mr. Costello is an active member of the American Intellectual Property Law Association, the California State Bar Intellectual Property Section, and the Sacramento County Bar Intellectual Property Section. He is also a member of the Washington State Bar Association, although his membership is currently inactive. He is a registered patent attorney with the U.S. Patent and Trademark Office, enabling him to represent clients in patent and trademark matters before federal agencies. Mr. Costello is fluent in English and Spanish, allowing him to serve the diverse communities of Sacramento effectively.
