PBS
Pbs: Who Made America?: Innovators: Joseph Wilson
A businessman with an eye for innovations and the patience to research them, Wilson reinvented the Haloid Company as Xerox and made its name synonymous with photocopying.
Massachusetts Institute of Technology
Mit: Inventor of the Week: Chester Carlson
Massachusetts Institute of Technology provides interesting information on Chester F. Carlson, the inventor of the photocopier. The site provides good background on the history of the photocopier, and a photo of Carlson.