Hay Yeung concentrates his practice in the areas of Telecommunications, Electrical, Physics and Software and focuses on the preparation and prosecution of patent applications as well as patent infringement, freedom to operate, patentability and invalidity analyses. Concurrently a Lead Faculty at the University of Phoenix (Jersey City, NJ), Hay Yeung lectures in the areas of telecommunications, networking, finance, business research, mathematics and science. Previously Hay Yeung was a Systems Engineer at AT&T.