Inventor · disambiguated record
Nobuto Yokokawa
Also filed as: YOKOKAWA NOBUTO
25 granted patents·3 pending applications·1,013 citations·filing 1995–2012
97Inventor score
Top patents by PatentIndex Score
28 records- 0198US7376375B2Belt-drive control device, color-shift detecting method, color-shift detecting device, and image forming apparatusRICOH KK·Filed 2006·Granted May 20, 2008·47 cites·42 claims
- 0297US7386262B2Belt driving control apparatus and image forming apparatus which uses a moving average process and a revolution average processRICOH KK·Filed 2006·Granted Jun 10, 2008·34 cites·9 claims
- 0397US6125243AToner replenishing and developer replacing device for a developing unit of an image forming apparatusRICOH KK·Filed 1998·Granted Sep 26, 2000·106 cites·4 claims
- 0497US5915155AToner replenishing and developer replacing device for a developing unit of an image forming apparatusRICOH KK·Filed 1996·Granted Jun 22, 1999·110 cites·16 claims
- 0596US7251444B2Apparatus for controlling driving of endless belt, and image forming apparatusRICOH KK·Filed 2005·Granted Jul 31, 2007·25 cites·27 claims
- 0696US6295438B1Method and apparatus for forming an image capable of supplying a proper amount of a lubricant to each image forming sectionRICOH KK·Filed 2000·Granted Sep 25, 2001·80 cites·14 claims
- 0795US5999773AImage forming apparatus and cleaning method for contact-charging memberRICOH KK·Filed 1998·Granted Dec 7, 1999·92 cites·19 claims
- 0894US7509074B2Method and apparatus for image forming capable of effectively reducing unevenness of density and color displacement of imagesRICOH KK·Filed 2007·Granted Mar 24, 2009·16 cites·14 claims
- 0994US5638159ADeveloping unit for an image forming apparatus and method of collecting bicomponent developer therefromRICOH KK·Filed 1995·Granted Jun 10, 1997·81 cites·8 claims
- 1094US5606408AImage forming apparatus and cleaning device thereforRICOH KK·Filed 1995·Granted Feb 25, 1997·73 cites·35 claims
- 1193US7454150B2Image forming apparatus having a resist rotary memberRICOH KK·Filed 2006·Granted Nov 18, 2008·16 cites·4 claims
- 1293US5774772AToner cartridge having a toner stirring memberRICOH KK·Filed 1996·Granted Jun 30, 1998·66 cites·65 claims
- 1390US7933546B2Lubricant applying device and image forming apparatusRICOH CO LTD·Filed 2007·Granted Apr 26, 2011·11 cites·14 claims
- 1490US5619316AImage forming apparatusRICOH KK·Filed 1996·Granted Apr 8, 1997·53 cites·5 claims
- 1589US7627268B2Image forming apparatus capable of providing a stable belt movement in a belt unitRICOH KK·Filed 2006·Granted Dec 1, 2009·10 cites·11 claims
- 1689US7373093B2Apparatus and method for color image forming, and computer program product for driver controllerRICOH KK·Filed 2005·Granted May 13, 2008·14 cites·34 claims
- 1789US6949896B2Apparatus for and method of driving motor to move object at a constant velocityRICOH KK·Filed 2003·Granted Sep 27, 2005·54 cites·24 claims
- 1884US7110700B2Belt driving controller, process cartridge, and image forming apparatusRICOH KK·Filed 2004·Granted Sep 19, 2006·22 cites·54 claims
- 1982US7609998B2Transfer unit and image forming apparatusRICOH KK·Filed 2007·Granted Oct 27, 2009·6 cites·10 claims
- 2082US7257339B2Method and apparatus for image forming capable of effectively reducing unevenness of density and color displacement of imagesRICOH KK·Filed 2004·Granted Aug 14, 2007·17 cites·25 claims
- 2179US8219000B2Image forming apparatus capable of effectively performing a maintenance operationKUMA KAZUOSA·Filed 2006·Granted Jul 10, 2012·6 cites·41 claims
- 2278US5598254ACartridge for replenishing two-ingredient developer to an image forming apparatus and a replenishing device using the sameRICOH KK·Filed 1995·Granted Jan 28, 1997·54 cites·8 claims
- 2371US7330009B2Method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing motor oscillationRICOH KK·Filed 2004·Granted Feb 12, 2008·16 cites·6 claims
- 2463US7800335B2Method, apparatus, and program for driving a motor in a feedback control system, capable of suppressing motor oscillationRICOH KK·Filed 2007·Granted Sep 21, 2010·4 cites·21 claims
- 2552US8843009B2Image forming apparatus having a transfer member mount accommodating multiple different sizes of transfer membersYOGOSAWA KAZUKI·Filed 2012·Granted Sep 23, 2014·0 cites·13 claims
- 2640US2008145102A1Surface-moving-body driving device, belt device, and image forming apparatusRICOH KK·Filed 2007·Application pending·0 cites
- 2739US2007248391A1Image forming apparatus with sheet guiding unit between transfering unit and fixing unitYOKOKAWA NOBUTO·Filed 2007·Application pending·0 cites
- 2836US2006133873A1Belt drive controlling method, belt drive controlling apparatus, belt apparatus, image forming apparatus, and computer productANDOH TOSHIYUKI·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →