Many RPI graduates have made important inventions, including Allen B. DuMont ('24), creator of the first commercial television and radar; Keith D. Millis ('38), inventor of ductile iron; Ted Hoff ('58), father of the microprocessor; Raymond Tomlinson ('63), often credited with the invention of e-mail; inventor of the digital camera Steven Sasson and Curtis Priem ('82), designer of the first graphics processor for the PC, and co-founder of NVIDIA. RPI Prof. Matthew Hunter invented a process to refine titanium in 1910. H. Joseph Gerber pioneered computer-automated manufacturing systems for industry.