Inventor · disambiguated record
Donald Wayne Stafford
Also filed as: STAFFORD DONALD W · STAFFORD DONALD WAYNE
37 granted patents·5 pending applications·583 citations·filing 1977–2018
98Inventor score
Top patents by PatentIndex Score
42 records- 0196US6481837B1Ink delivery systemFiled 2001·Granted Nov 19, 2002·107 cites·23 claims
- 0296US6243115B1Pressurized ink supply and delivery system for an ink jet printerLEXMARK INT INC·Filed 2000·Granted Jun 5, 2001·97 cites·19 claims
- 0390US10365586B1End seal assembly for an undercut developer rollLEXMARK INT INC·Filed 2018·Granted Jul 30, 2019·4 cites·6 claims
- 0490US5085171ACompliant doctor bladeLEXMARK INT INC·Filed 1991·Granted Feb 4, 1992·46 cites·18 claims
- 0585US10175649B1Negative pressure electrostatic process unit for printers and multifunction peripheralsTOSHIBA KK·Filed 2017·Granted Jan 8, 2019·2 cites·20 claims
- 0684US9261812B1Toner adder roll having an abrasive agent additiveLEXMARK INT INC·Filed 2015·Granted Feb 16, 2016·3 cites·20 claims
- 0782US5623718AExtended life compliant doctor blade with conductive abrasive memberLEXMARK INT INC·Filed 1995·Granted Apr 22, 1997·34 cites·17 claims
- 0881US6145971APrinter ink pump and method of supplying ink using motion of the carrierLEXMARK INT INC·Filed 2000·Granted Nov 14, 2000·23 cites·19 claims
- 0980US5248560AFilled urethane developer rollerLEXMARK INT INC·Filed 1992·Granted Sep 28, 1993·24 cites·20 claims
- 1078US8948649B2Sealing member having internal lubricant additivesMCCOY JODY EVAN·Filed 2012·Granted Feb 3, 2015·6 cites·16 claims
- 1176US7356278B2Cleaning member for charging deviceLEXMARK INT INC·Filed 2005·Granted Apr 8, 2008·7 cites·16 claims
- 1274US6117557ACaprolactone ester polyurethane developer rollerLEXMARK INT INC·Filed 1995·Granted Sep 12, 2000·33 cites·4 claims
- 1373US7231163B2Apparatus and method of reducing charge roller contaminationLEXMARK INT INC·Filed 2005·Granted Jun 12, 2007·5 cites·15 claims
- 1473US5708943ACompliant doctor blade surface having molybdenum disulfideLEXMARK INT INC·Filed 1996·Granted Jan 13, 1998·23 cites·10 claims
- 1572US7167672B2Method and device for conveying waste toner in an image forming deviceLEXMARK INT INC·Filed 2005·Granted Jan 23, 2007·4 cites·19 claims
- 1672US5702812ACompliant doctor bladeLEXMARK INT INC·Filed 1996·Granted Dec 30, 1997·24 cites·20 claims
- 1769US8017192B2Radiation cured coatings for image forming device componentsLEXMARK INT INC·Filed 2007·Granted Sep 13, 2011·2 cites·6 claims
- 1869US5804114AProcess of making a polyurethane roller with high surface resistanceLEXMARK INT INC·Filed 1997·Granted Sep 8, 1998·23 cites·12 claims
- 1968US5707743APolyurethane roller with high surface resistanceLEXMARK INT INC·Filed 1996·Granted Jan 13, 1998·22 cites·8 claims
- 2066US8304066B2Toner release coatingANDERSON RICHARD KENT·Filed 2008·Granted Nov 6, 2012·3 cites·18 claims
- 2165US4545693ADrive for thermal printing lift-off correctionIBM·Filed 1983·Granted Oct 8, 1985·15 cites·20 claims
- 2259US8238803B2Doctor blade surface energy modificationANDERSON RICHARD KENT·Filed 2008·Granted Aug 7, 2012·2 cites·18 claims
- 2359US5797076AAbrasive shim compliant doctor bladeLEXMARK INT INC·Filed 1997·Granted Aug 18, 1998·15 cites·16 claims
- 2456US6935734B2Apparatus and method for printing using a coating solidLEXMARK INT INC·Filed 2003·Granted Aug 30, 2005·6 cites·5 claims
- 2556US4419024ASilicon dioxide intermediate layer in thermal transfer mediumIBM·Filed 1981·Granted Dec 6, 1983·8 cites·31 claims
- 2654US6072970ACharge rollerLEXMARK INT INC·Filed 1996·Granted Jun 6, 2000·15 cites·21 claims
- 2753US7519308B2Device and method for removing image forming substance depositsBRACKEN PETER WALLACE·Filed 2006·Granted Apr 14, 2009·2 cites·26 claims
- 2853US5853868AElectrical contact material for flexible doctor bladeLEXMARK INT INC·Filed 1997·Granted Dec 29, 1998·16 cites·26 claims
- 2950US2007054072A1Packaging material for a developing agent cartridgeLEXMARK INT INC·Filed 2005·Application pending·0 cites
- 3047US8448336B2Electrophotographic roller with resistance to nip bandingBARCELO JANE ELECE·Filed 2008·Granted May 28, 2013·1 cites·34 claims
- 3147US6990308B1Image forming device, print cartridge and doctor blade assembly that reduce vibrations at doctoring media nipLEXMARK INT INC·Filed 2004·Granted Jan 24, 2006·3 cites·18 claims
- 3246US2013243500A1Electrophotographic Roller with Resistance to Nip BandingLEXMARK INT INC·Filed 2013·Application pending·0 cites
- 3344US7899384B2Apparatus and method of reducing charge roller contaminationLEXMARK INT INC·Filed 2008·Granted Mar 1, 2011·0 cites·15 claims
- 3443US7310494B2Developing agent transport and storageLEXMARK INT INC·Filed 2005·Granted Dec 18, 2007·0 cites·20 claims
- 3542US7162191B2Buffed toner metering blade for use with an imaging apparatusLEXMARK INT INC·Filed 2004·Granted Jan 9, 2007·2 cites·14 claims
- 3640US2015293469A1Roll Having Textured Axial Ends to Prevent Toner LeakageLEXMARK INT INC·Filed 2014·Application pending·0 cites
- 3739US2019094785A1Electrified conductive cleaner blade for printers and multifunction peripheralsTOSHIBA KK·Filed 2017·Application pending·0 cites
- 3838US6087011APolyurethane roller with oxide surface layerLEXMARK INT INC·Filed 1998·Granted Jul 11, 2000·4 cites·2 claims
- 3936US2007237552A1Doctor Blade and Developer Assembly with Precision Diameter Radius for Improved Doctoring ConsistencyMCALPINE ROBERT W·Filed 2006·Application pending·0 cites
- 4033US7236730B2Dampening mechanism for an image forming apparatusLEXMARK INT INC·Filed 2004·Granted Jun 26, 2007·0 cites·25 claims
- 4131US5637391APowder coated charge rollerLEXMARK INT INC·Filed 1995·Granted Jun 10, 1997·2 cites·24 claims
- 4220US4101224AEscapement mechanism for typewritersIBM·Filed 1977·Granted Jul 18, 1978·0 cites·12 claims
Join the waitlist — get patent alerts
Get an alert when Donald Wayne Stafford files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →