Dr. Campbell began his career with the U.S. Patent and Trademark Office, where he first worked as a patent examiner for four years and was subsequently promoted to a primary patent examiner, a position in which he served for five years. During his tenure there, Dr. Campbell allowed over 400 patents, specializing in a variety of physiological conditions used for nucleic acid detection via hybridization, nucleic acid amplification (PCR), detection of tumors/cancer via mutations, recombinant polypeptides, human genes, and bioinformatics. Dr. Campbell has extensive law firm experience preparing and prosecuting patent applications in a wide variety of biotechnology areas. He holds a Ph.D. in biochemistry from Albert Einstein College of Medicine, supplemented with post-doctoral training at the National Institute of Allergy and Infectious Diseases (NIAID). He is a patent agent registered to practice before the U.S. Patent and Trademark Office.