Dr. Mark Dean- IBM Fellow (Retired), National Inventor Hall of Fame Inductee Within IBM we have witnessed innovations from a number of Black IBM Inventors. Retired IBM Fellow Dr. Mark Dean is among this notable group. Dr. Dean is credited with developing a number of landmark technologies, such as the color PC monitor and the Industry Standard Architecture system bus, which allows peripheral devices such as disk drives, printers and monitors to be plugged in directly to the computer. In 1999, Dr. Dean led a team of engineers in IBM’s Austin, Texas lab to create the first gigahertz chip; this revolutionary technology is able to do a billion calculations a second. Dr. Dean also holds three of IBM’s original nine patents and has more than 20 patents connected with his name.