Inventor · disambiguated record
John Parker Richey
Also filed as: RICHEY JOHN P · RICHEY JOHN PARKER
21 granted patents·1 pending application·410 citations·filing 1994–2017
95Inventor score
Top patents by PatentIndex Score
22 records- 0196US6366174B1Method and apparatus for providing a clock generation circuit for digitally controlled frequency or spread spectrum clockingLEXMARK INT INC·Filed 2000·Granted Apr 2, 2002·178 cites·18 claims
- 0292US6285383B1Method of controlling laser scanner phase in a multicolor electrophotographic machineLEXMARK INT INC·Filed 2000·Granted Sep 4, 2001·58 cites·24 claims
- 0391US9639038B1Power management and control for a fuser of an electrophotographic imaging deviceLEXMARK INT INC·Filed 2015·Granted May 2, 2017·5 cites·20 claims
- 0486US6580881B2Method of detecting waste toner in a container of an image forming apparatusLEXMARK INT INC·Filed 2001·Granted Jun 17, 2003·34 cites·20 claims
- 0582US7593653B2Optical sensor system with a dynamic threshold for monitoring toner transfer in an image forming deviceLEXMARK INT INC·Filed 2007·Granted Sep 22, 2009·10 cites·20 claims
- 0681US6661981B2Method and apparatus for controlling transfer belt velocity of a color printerLEXMARK INT INC·Filed 2001·Granted Dec 9, 2003·23 cites·35 claims
- 0778US10001732B2Power management and control for a fuser of an electrophotographic imaging deviceLEXMARK INT INC·Filed 2017·Granted Jun 19, 2018·1 cites·8 claims
- 0877US7018121B2Combined paper and transparency sensor for an image forming apparatusLEXMARK INT INC·Filed 2004·Granted Mar 28, 2006·21 cites·6 claims
- 0974US6560434B2Intermediate transfer member motion control via surface wheel feedbackLEXMARK INT INC·Filed 2001·Granted May 6, 2003·15 cites·32 claims
- 1071US6252618B1Method of controlling print registration in an electrophotographic machineLEXMARK INT INC·Filed 2000·Granted Jun 26, 2001·13 cites·32 claims
- 1169US7277111B2Multiple speed modes for an electrophotographic deviceLEXMARK INT INC·Filed 2005·Granted Oct 2, 2007·3 cites·26 claims
- 1263US7890006B2Characterization of toner patch sensorLEXMARK INT INC·Filed 2007·Granted Feb 15, 2011·2 cites·16 claims
- 1360US6459443B1Method of minimizing print delay due to mirror motor warm-up in an electrophotographic machineLEXMARK INT INC·Filed 2001·Granted Oct 1, 2002·4 cites·22 claims
- 1455US8301049B2Characterization of toner patch sensor in an image forming deviceOMELCHENKO MARK A·Filed 2007·Granted Oct 30, 2012·2 cites·22 claims
- 1551US7515646B2Method and apparatus for reducing EMI emissions for data signals traveling over a data pathwayLEXMARK INT INC·Filed 2004·Granted Apr 7, 2009·2 cites·30 claims
- 1645US5729270AToner conservation by pel modulation with operator controlLEXMARK INT INC·Filed 1994·Granted Mar 17, 1998·10 cites·2 claims
- 1741US6147699ALow electromagnetic emissions and improved signal quality video drive architecture for laser printersLEXMARK INT INC·Filed 1998·Granted Nov 14, 2000·10 cites·25 claims
- 1840US5650857ABit map adjustment preserving resolutionLEXMARK INT INC·Filed 1996·Granted Jul 22, 1997·9 cites·16 claims
- 1933US5986681AToner conservation by PEL modulation with operator controlLEXMARK INT INC·Filed 1997·Granted Nov 16, 1999·3 cites·2 claims
- 2033US5783963AASIC with selectable output driversLEXMARK INT INC·Filed 1996·Granted Jul 21, 1998·6 cites·4 claims
- 2132US7433630B2Method and apparatus for characterizing and compensating drive train rotational velocity errorsPARGETT STACY M·Filed 2004·Granted Oct 7, 2008·1 cites·12 claims
- 2232US2005134679A1Margin registration of a scan line in an electrophotographic printerFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →