Inventor
LEHMAN RICHARD F
US24 patents
⚠️ This page may combine multiple inventors who share the name “LEHMAN RICHARD F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
XEROX CORP
18 patentsUS5313291AMay 17, 1994
Method for matching color prints to color images on a monitor screen
XEROX CORP121 citations98
US5260718ANov 9, 1993
Liquid crystal shutter xerographic printer with offset configuration lamp aperture and copier/printer with optically aligned lamps, image bars, and lenses
XEROX CORP65 citations94
US5155541AOct 13, 1992
Single pass digital printer with black, white and 2-color capability
XEROX CORP37 citations92
US4518895AMay 21, 1985
Mechanism and method for controlling the temperature and output of a fluorescent lamp
XEROX CORP25 citations82
US4118122AOct 3, 1978
Method of rendering objects uncopyable by photocopy processes
XEROX CORP27 citations82
US4868587ASep 19, 1989
Image halftoning system for printers
XEROX CORP21 citations81
US4576462AMar 18, 1986
Illumination system for an electrophotographic printing device
XEROX CORP14 citations74
US4334767AJun 15, 1982
Flash exposure system
XEROX CORP14 citations74
US4272188AJun 9, 1981
Exposure compensation circuit for a copier
XEROX CORP10 citations74
US4227795AOct 14, 1980
Half-tone imaging system
XEROX CORP8 citations71
US4982233AJan 1, 1991
Method and apparatus for sensing contamination within an optical scanning system
XEROX CORP4 citations63
US4571058AFeb 18, 1986
Flash illumination and optical imaging system
XEROX CORP6 citations63
US4188213AFeb 12, 1980
Color corrected printing system
XEROX CORP4 citations63
US5083159AJan 21, 1992
Process for initial alignment of document illuminator
XEROX CORP2 citations62
US4794422ADec 27, 1988
Electrophotographic reproduction machine with document exposure system directly coupled to ac line input
XEROX CORP5 citations61
US4519703AMay 28, 1985
Document reproduction device utilizing a selective color illuminator
XEROX CORP6 citations58
US4967265AOct 30, 1990
Color correction system for an electrophotographic copying machine
XEROX CORP1 citations52
US4082450AApr 4, 1978
Compact illumination system for optically providing a structured photoreceptor charge distribution
XEROX CORP1 citations52
HOWTEK INC
5 patentsUS6606171B1Aug 12, 2003
Digitizing scanner
HOWTEK INC239 citations97
US5237172AAug 17, 1993
Calibrated color scanner with reference level adjustment
HOWTEK INC34 citations91
US5424537AJun 13, 1995
Calibrated color scanner
HOWTEK INC13 citations72
US6023348AFeb 8, 2000
Rotary image scanner capable of mounting drums of various diameters
HOWTEK INC9 citations68
US5515182AMay 7, 1996
Rotary scanner
HOWTEK INC6 citations62