Inventor · disambiguated record
Ryoichi Fujita
Also filed as: FUJITA RYOICHI
32 granted patents·1 pending application·761 citations·filing 1991–2011
98Inventor score
Top patents by PatentIndex Score
33 records- 0197US6077635AToner, two-component developer and image forming methodCANON KK·Filed 1998·Granted Jun 20, 2000·115 cites·164 claims
- 0293US7794908B2TonerCANON KK·Filed 2009·Granted Sep 14, 2010·16 cites·22 claims
- 0393US7776501B2Color tonerCANON KK·Filed 2008·Granted Aug 17, 2010·14 cites·6 claims
- 0491US7794909B2TonerCANON KK·Filed 2009·Granted Sep 14, 2010·14 cites·14 claims
- 0591US7244539B2Magnetic carrier and two-component developerCANON KK·Filed 2004·Granted Jul 17, 2007·36 cites·13 claims
- 0691US7144668B2Toner and two-component developerCANON KK·Filed 2004·Granted Dec 5, 2006·37 cites·17 claims
- 0790US5512402ACarrier for electrophotography, two-component type developer, and image forming methodCANON KK·Filed 1994·Granted Apr 30, 1996·36 cites·26 claims
- 0889US6346356B1Toner, toner production process, and image-forming methodCANON KK·Filed 2000·Granted Feb 12, 2002·35 cites·39 claims
- 0988US7943281B2Black tonerCANON KK·Filed 2006·Granted May 17, 2011·11 cites·11 claims
- 1087US8524434B2Toner and method for manufacturing tonerTOMINAGA TSUNEYOSHI·Filed 2011·Granted Sep 3, 2013·7 cites·8 claims
- 1187US5912099AMagenta toner, process for producing same and color image forming method using sameCANON KK·Filed 1997·Granted Jun 15, 1999·38 cites·47 claims
- 1286US5851714AToner for developing electrostatic image and fixing methodCANON KK·Filed 1997·Granted Dec 22, 1998·38 cites·32 claims
- 1382US6137977AImage forming method and image forming apparatus using specific developer compositionCANON KK·Filed 1998·Granted Oct 24, 2000·33 cites·84 claims
- 1482US5747209AToner for developing electrostatic images containing aromatic hydroxycarboxylic acid and metal compound of the aromatic hydroxycarboxylic acidCANON KK·Filed 1996·Granted May 5, 1998·31 cites·21 claims
- 1581US5700617AToner for developing electrostatic images and charge-controlling agentCANON KK·Filed 1996·Granted Dec 23, 1997·30 cites·43 claims
- 1679US6328147B1Clutch for motorcyclesFUJITA CO LTD·Filed 2000·Granted Dec 11, 2001·18 cites·4 claims
- 1779US6013406AToner for developing electrostatic images, and image-forming methodCANON KK·Filed 1998·Granted Jan 11, 2000·28 cites·68 claims
- 1879US5670288ACarrier for electrophotography, two-component type developer, and image forming methodCANON KK·Filed 1996·Granted Sep 23, 1997·25 cites·75 claims
- 1976US6312862B1Two-component type developer and image forming methodCANON KK·Filed 1999·Granted Nov 6, 2001·25 cites·115 claims
- 2074US5733702AImage forming method employing toner with external additiveCANON KK·Filed 1995·Granted Mar 31, 1998·21 cites·145 claims
- 2174US5604071AToner for developing electrostatic imageCANON KK·Filed 1995·Granted Feb 18, 1997·27 cites·22 claims
- 2272US5994019AImage forming methodCANON KK·Filed 1997·Granted Nov 30, 1999·22 cites·36 claims
- 2369US6187495B1Yellow toner, process for producing the tower and image forming method using the tonerCANON KK·Filed 1999·Granted Feb 13, 2001·18 cites·71 claims
- 2468US5637432AToner for developing electrostatic image comprising titanium oxide particlesCANON KK·Filed 1995·Granted Jun 10, 1997·16 cites·45 claims
- 2567US8460845B2Cyan tonerKAYA TAKAAKI·Filed 2009·Granted Jun 11, 2013·3 cites·8 claims
- 2665US5620824AToner, developer and image forming methodCANON KK·Filed 1994·Granted Apr 15, 1997·14 cites·71 claims
- 2761US5885742ACarrier for electrophotography, two-component type developer, and image forming methodCANON KK·Filed 1997·Granted Mar 23, 1999·14 cites·67 claims
- 2858US6953648B2Process for producing toner particlesCANON KK·Filed 2003·Granted Oct 11, 2005·8 cites·10 claims
- 2956US6285848B1Electrophotographic apparatus, image forming method, and process cartridge for developing an image with toner containing an external additiveCANON KK·Filed 1998·Granted Sep 4, 2001·12 cites·63 claims
- 3052US5418102ADeveloper for developing electrostatic image, image forming method, toner imager fixing method and image forming apparatusCANON KK·Filed 1991·Granted May 23, 1995·9 cites·52 claims
- 3151US2010273102A1Color tonerCANON KK·Filed 2010·Application pending·0 cites
- 3248US5842097AImage forming and transferring method using a peeling layerCANON KK·Filed 1996·Granted Nov 24, 1998·8 cites·18 claims
- 3334US5750298AYellow toner for developing electrostatic image, two component developer, image sheetCANON KK·Filed 1997·Granted May 12, 1998·2 cites·49 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →