"Electrophotography" . . "xerographs" . "xerographic copiers" . . . "xerographed" . "Xerography process" . . "copying onto plain paper" . "xerography process" . "xerographic" . . . "Xerographic copier" . "copier" . "xeroxed" . . . . . . . "Xerography" . "electrostatic" . . "Electrophotography / Xerography" . . "photocopied" . "electrophotography" . "xerographic process" . "Xerox" . . "color Xerox" . . "video printer" . . . . "xerographic photocopying" . "xerographer" . "xerox" . "copying" . "dry toner transfer process" . "xerography" . "Xerography" . "photocopiers" . "rotating drum" . . "dry photocopier" .