Inventor · disambiguated record
Richard F. Lehman
Also filed as: LEHMAN RICHARD F
24 granted patents·730 citations·filing 1975–1997
96Inventor score
Top patents by PatentIndex Score
24 records- 0193US6606171B1Digitizing scannerHOWTEK INC·Filed 1997·Granted Aug 12, 2003·239 cites·16 claims
- 0293US5260718ALiquid crystal shutter xerographic printer with offset configuration lamp aperture and copier/printer with optically aligned lamps, image bars, and lensesXEROX CORP·Filed 1992·Granted Nov 9, 1993·65 cites·2 claims
- 0392US5065185AMulti-function detecting device for a document reproduction machinePOWERS EDWARD A·Filed 1989·Granted Nov 12, 1991·58 cites·7 claims
- 0491US5313291AMethod for matching color prints to color images on a monitor screenXEROX CORP·Filed 1991·Granted May 17, 1994·121 cites·9 claims
- 0588US5155541ASingle pass digital printer with black, white and 2-color capabilityXEROX CORP·Filed 1991·Granted Oct 13, 1992·37 cites·12 claims
- 0685US4518895AMechanism and method for controlling the temperature and output of a fluorescent lampXEROX CORP·Filed 1983·Granted May 21, 1985·25 cites·2 claims
- 0779US4576462AIllumination system for an electrophotographic printing deviceXEROX CORP·Filed 1984·Granted Mar 18, 1986·14 cites·3 claims
- 0877US4118122AMethod of rendering objects uncopyable by photocopy processesXEROX CORP·Filed 1977·Granted Oct 3, 1978·27 cites·6 claims
- 0975US5237172ACalibrated color scanner with reference level adjustmentHOWTEK INC·Filed 1992·Granted Aug 17, 1993·34 cites·28 claims
- 1073US4334767AFlash exposure systemXEROX CORP·Filed 1979·Granted Jun 15, 1982·14 cites·3 claims
- 1166US4868587AImage halftoning system for printersXEROX CORP·Filed 1988·Granted Sep 19, 1989·21 cites·9 claims
- 1260US4571058AFlash illumination and optical imaging systemXEROX CORP·Filed 1984·Granted Feb 18, 1986·6 cites·5 claims
- 1354US5424537ACalibrated color scannerHOWTEK INC·Filed 1990·Granted Jun 13, 1995·13 cites·4 claims
- 1454US4227795AHalf-tone imaging systemXEROX CORP·Filed 1977·Granted Oct 14, 1980·8 cites·9 claims
- 1550US4272188AExposure compensation circuit for a copierXEROX CORP·Filed 1979·Granted Jun 9, 1981·10 cites·1 claims
- 1644US6023348ARotary image scanner capable of mounting drums of various diametersHOWTEK INC·Filed 1994·Granted Feb 8, 2000·9 cites·69 claims
- 1742US4519703ADocument reproduction device utilizing a selective color illuminatorXEROX CORP·Filed 1983·Granted May 28, 1985·6 cites·4 claims
- 1842US4188213AColor corrected printing systemXEROX CORP·Filed 1975·Granted Feb 12, 1980·4 cites·3 claims
- 1941US4794422AElectrophotographic reproduction machine with document exposure system directly coupled to ac line inputXEROX CORP·Filed 1987·Granted Dec 27, 1988·5 cites·2 claims
- 2039US4982233AMethod and apparatus for sensing contamination within an optical scanning systemXEROX CORP·Filed 1989·Granted Jan 1, 1991·4 cites·7 claims
- 2138US5515182ARotary scannerHOWTEK INC·Filed 1992·Granted May 7, 1996·6 cites·42 claims
- 2236US5083159AProcess for initial alignment of document illuminatorXEROX CORP·Filed 1991·Granted Jan 21, 1992·2 cites·3 claims
- 2333US4082450ACompact illumination system for optically providing a structured photoreceptor charge distributionXEROX CORP·Filed 1975·Granted Apr 4, 1978·1 cites·6 claims
- 2431US4967265AColor correction system for an electrophotographic copying machineXEROX CORP·Filed 1989·Granted Oct 30, 1990·1 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →