Inventor · disambiguated record
Kei Yasutomi
Also filed as: YASUTOMI KEI
36 granted patents·4 pending applications·855 citations·filing 1996–2015
98Inventor score
Top patents by PatentIndex Score
40 records- 0199US6366751B1Image forming apparatus including preselected range between charge injection layer and voltage potentialRICOH KK·Filed 2000·Granted Apr 2, 2002·182 cites·57 claims
- 0298US6625409B2Image forming apparatus having a diamond-like structure surface protection layer on a photoconductive layerRICOH KK·Filed 2002·Granted Sep 23, 2003·70 cites·24 claims
- 0397US6654579B2Image forming apparatus including diamond-like or amorphous structure containing hydrogen surface protection layerRICOH KK·Filed 2002·Granted Nov 25, 2003·65 cites·22 claims
- 0496US7620336B2Apparatus and method for fixing an imageRICOH KK·Filed 2005·Granted Nov 17, 2009·21 cites·38 claims
- 0596US6757509B2Image forming apparatusRICOH KK·Filed 2001·Granted Jun 29, 2004·56 cites·10 claims
- 0696US5740494AConfigured to enhance toner collecting efficiency and toner redepositing efficiencyRICOH KK·Filed 1996·Granted Apr 14, 1998·91 cites·40 claims
- 0795US7212753B2Image forming apparatus and process cartridgeRICOH KK·Filed 2005·Granted May 1, 2007·23 cites·13 claims
- 0895US5999773AImage forming apparatus and cleaning method for contact-charging memberRICOH KK·Filed 1998·Granted Dec 7, 1999·92 cites·19 claims
- 0994US6597885B2Image forming apparatus having a developing device with a magnet brushRICOH KK·Filed 2001·Granted Jul 22, 2003·45 cites·68 claims
- 1092US6778805B2Image forming apparatus having a developing device with a magnet brushRICOH KK·Filed 2003·Granted Aug 17, 2004·34 cites·95 claims
- 1190US7751746B2Device for driving rotary body with mechanism for dampening fluctuation in rotation velocityRICOH KK·Filed 2008·Granted Jul 6, 2010·11 cites·19 claims
- 1288US8553287B2Pseudo-halftoning device, image forming apparatus, and image forming systemYASUTOMI KEI·Filed 2011·Granted Oct 8, 2013·12 cites·16 claims
- 1388US7463837B2Image forming apparatus with superimposed dark and light toner imagesRICOH KK·Filed 2006·Granted Dec 9, 2008·10 cites·27 claims
- 1487US7738813B2Corona charger having two charging regionsRICOH KK·Filed 2007·Granted Jun 15, 2010·9 cites·11 claims
- 1587US7551868B2Image forming apparatus and image forming methodRICOH KK·Filed 2007·Granted Jun 23, 2009·9 cites·20 claims
- 1687US6819901B1Developing method and a developing device for image forming apparatusRICOH KK·Filed 2000·Granted Nov 16, 2004·27 cites·29 claims
- 1785US7787815B2Image forming deviceRICOH KK·Filed 2007·Granted Aug 31, 2010·8 cites·4 claims
- 1885US6978109B2Image forming apparatusRICOH KK·Filed 2004·Granted Dec 20, 2005·20 cites·24 claims
- 1984US10129437B2Image processing apparatus, image processing method, recording medium, and programRICOH CO LTD·Filed 2015·Granted Nov 13, 2018·4 cites·11 claims
- 2084US8503919B2Image forming apparatus for controlling image clarity using clear tonerSONE TAKUROH·Filed 2011·Granted Aug 6, 2013·5 cites·5 claims
- 2184US7657218B2Gloss providing sheet and image formation apparatusRICOH KK·Filed 2007·Granted Feb 2, 2010·7 cites·14 claims
- 2280US7643179B2Image forming apparatus and image forming methodRICOH KK·Filed 2006·Granted Jan 5, 2010·6 cites·8 claims
- 2379US7822351B2Filling-rate lowering and rolling rate adjusting image forming apparatusRICOH KK·Filed 2008·Granted Oct 26, 2010·5 cites·20 claims
- 2475US8180270B2Image forming apparatus for controlling glossiness of an imageYASUTOMI KEI·Filed 2008·Granted May 15, 2012·4 cites·12 claims
- 2574US8126346B2Apparatus and method for fixing an imageYURA JUN·Filed 2009·Granted Feb 28, 2012·4 cites·10 claims
- 2674US6800410B2Image forming apparatusRICOH KK·Filed 2002·Granted Oct 5, 2004·13 cites·48 claims
- 2769US7746502B2Dither matrix producing method and apparatus, image processing method and apparatus, image forming method and apparatus, program and recording mediumRICOH KK·Filed 2004·Granted Jun 29, 2010·8 cites·41 claims
- 2868US9323490B2Image processing apparatus and image processing methodYASUTOMI KEI·Filed 2014·Granted Apr 26, 2016·2 cites·14 claims
- 2968US8773721B2Image processing apparatus and image forming apparatus for performing halftone processing on point-of-purchase imageYASUTOMI KEI·Filed 2009·Granted Jul 8, 2014·2 cites·17 claims
- 3067US8331812B2Image forming apparatusYASUTOMI KEI·Filed 2010·Granted Dec 11, 2012·1 cites·15 claims
- 3162US7724394B2Image forming apparatus and image forming method using pseudo half tone processing with different resolutionsRICOH KK·Filed 2004·Granted May 25, 2010·5 cites·27 claims
- 3253US8908234B2Image capture apparatus, image capture system, and image capture methodYASUTOMI KEI·Filed 2013·Granted Dec 9, 2014·0 cites·8 claims
- 3350US9245319B2Image processing device, image processing method, and image forming apparatus that perform an enhancement process to input image dataYASUTOMI KEI·Filed 2013·Granted Jan 26, 2016·0 cites·11 claims
- 3450US7403735B2Image formation apparatus using an electrophotographic processRICOH KK·Filed 2003·Granted Jul 22, 2008·4 cites·9 claims
- 3545US8747944B2Method of manufacturing transfer sheet and transfer sheetFUNAHASHI KAZUKI·Filed 2012·Granted Jun 10, 2014·0 cites·17 claims
- 3645US2015071562A1Image processing apparatusYASUTOMI KEI·Filed 2014·Application pending·0 cites
- 3745US2006279589A1Image processing apparatus and image forming apparatusYASUTOMI KEI·Filed 2006·Application pending·0 cites
- 3845US2006066910A1Image forming apparatus, image forming method, and recording mediumYASUTOMI KEI·Filed 2005·Application pending·0 cites
- 3941US2008219702A1Image forming apparatus, process cartridge, and image forming methodTSUKAMOTO TAKEO·Filed 2008·Application pending·0 cites
- 4036US8897689B2Image forming apparatus and image forming information processing apparatusSONE TAKUROH·Filed 2012·Granted Nov 25, 2014·0 cites·15 claims
Join the waitlist — get patent alerts
Get an alert when Kei Yasutomi 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 →