Inventor
WADE THOMAS CAMPBELL
US17 patents
⚠️ This page may combine multiple inventors who share the name “WADE THOMAS CAMPBELL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
LEXMARK INT INC
16 patentsUS5995774ANov 30, 1999
Method and apparatus for storing data in a non-volatile memory circuit mounted on a printer's process cartridge
LEXMARK INT INC198 citations96
US5797061AAug 18, 1998
Method and apparatus for measuring and displaying a toner tally for a printer
LEXMARK INT INC88 citations96
US6091891AJul 18, 2000
Method and apparatus for calibrating delay lines to create gray levels in continuous tone printing
LEXMARK INT INC33 citations92
US6561504B2May 13, 2003
Finisher with single roller for frictionally moving each sheet
LEXMARK INT INC30 citations91
US6304731B1Oct 16, 2001
Printer for narrow media
LEXMARK INT INC36 citations91
US5966231AOct 12, 1999
Method and apparatus for aligning multiple laser beams
LEXMARK INT INC46 citations91
US6902161B2Jun 7, 2005
Sheet feeder avoiding sheet sag
LEXMARK INT INC22 citations90
US6362847B1Mar 26, 2002
Electronic control arrangement for a laser printer
LEXMARK INT INC22 citations90
US6175375B1Jan 16, 2001
Method and apparatus for compensating for a darkness shift during the life of an electrophotographic printer cartridge
LEXMARK INT INC50 citations90
US6512597B1Jan 28, 2003
Method and apparatus for correcting unadjusted threshold arrays for halftoning by use of parameterized transfer functions that generate adjusted threshold arrays at run time
LEXMARK INT INC39 citations89
US5982408ANov 9, 1999
Method and apparatus for HSYNC synchronization
LEXMARK INT INC19 citations84
US7190490B2Mar 13, 2007
Method for correcting unadjusted threshold arrays for halftoning by use of parameterized transfer functions that generate adjusted threshold arrays at run time
LEXMARK INT INC11 citations81
US6822672B1Nov 23, 2004
Printhead and fuser standby management
LEXMARK INT INC9 citations72
US6650352B2Nov 18, 2003
Electronic control arrangement for a laser printer
LEXMARK INT INC6 citations71
US5867203AFeb 2, 1999
EMI reduction in output devices
LEXMARK INT INC5 citations62
US6006008ADec 21, 1999
Motor drive system controlled by a phase accumulator and method therefor
LEXMARK INT INC4 citations61