Inventor · disambiguated record
Yasuo Asahina
Also filed as: ASAHINA YASUO · NAMIKI RYOICHI
48 granted patents·3 pending applications·2,205 citations·filing 1976–2008
99Inventor score
Top patents by PatentIndex Score
51 records- 0199US7374851B2Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming methodRICOH KK·Filed 2006·Granted May 20, 2008·67 cites·25 claims
- 0299US7318989B2Toner, developer, toner container, process cartridge, image forming apparatus, and image forming methodRICOH KK·Filed 2006·Granted Jan 15, 2008·71 cites·14 claims
- 0399US6363229B1Full-color toner image fixing method and apparatusRICOH KK·Filed 2000·Granted Mar 26, 2002·174 cites·18 claims
- 0498US7455942B2Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method using the sameRICOH KK·Filed 2005·Granted Nov 25, 2008·41 cites·19 claims
- 0598US7261989B2Toner for developing electrostatic images, developer, image forming method, and image forming apparatusRICOH KK·Filed 2006·Granted Aug 28, 2007·49 cites·16 claims
- 0698US7258959B2Toner for electrophotography and image forming apparatusRICOH KK·Filed 2005·Granted Aug 21, 2007·42 cites·34 claims
- 0798US6406826B1Carrier for image developer for electrophotographyRICOH KK·Filed 2000·Granted Jun 18, 2002·128 cites·11 claims
- 0898US6074794AToner for dry developingRICOH KK·Filed 1998·Granted Jun 13, 2000·134 cites·15 claims
- 0997US7169525B2Toner, developer, image forming apparatus, process cartridge and image forming processRICOH KK·Filed 2005·Granted Jan 30, 2007·37 cites·26 claims
- 1097US6303258B1Electrophotographic toner and image forming method using the tonerRICOH KK·Filed 2000·Granted Oct 16, 2001·76 cites·21 claims
- 1197US5840456AColor toner comprising two binder resins of differing softening pointRICOH KK·Filed 1996·Granted Nov 24, 1998·125 cites·15 claims
- 1297US4980258ADry type developer for electrophotographyRICOH KK·Filed 1989·Granted Dec 25, 1990·78 cites·13 claims
- 1397US4762763AToner for developing electrostatic latent imageRICOH KK·Filed 1986·Granted Aug 9, 1988·79 cites·18 claims
- 1496US7521164B2Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming methodRICOH KK·Filed 2008·Granted Apr 21, 2009·22 cites·7 claims
- 1595US6818369B2Toner for electrostatic image development and image forming method and apparatus using the tonerRICOH KK·Filed 2002·Granted Nov 16, 2004·58 cites·26 claims
- 1695US6500595B1Carrier for electrophotographic developer, method for manufacturing the carrier, and coating liquid for the methodRICOH KK·Filed 2000·Granted Dec 31, 2002·62 cites·48 claims
- 1795US5403690ADeveloper for developing latent electrostatic imagesRICOH KK·Filed 1994·Granted Apr 4, 1995·76 cites·17 claims
- 1894US7368213B2Toner and fixing device and image forming device using the sameRICOH KK·Filed 2005·Granted May 6, 2008·17 cites·19 claims
- 1994US6828075B2Carrier for electrophotography and developer using the sameRICOH KK·Filed 2002·Granted Dec 7, 2004·52 cites·19 claims
- 2094US6770411B2Negatively chargeable tonerRICOH KK·Filed 2002·Granted Aug 3, 2004·50 cites·9 claims
- 2194US4933250AMagenta color toner for developing latent electrostatic images in color electrophotographyRICOH KK·Filed 1988·Granted Jun 12, 1990·43 cites·15 claims
- 2293US7169522B2Toner for developing a latent electrostatic image, developer using the same, full-color toner kit using the same, image-forming apparatus using the same, image-forming process cartridge using the same and image-forming process using the sameRICOH KK·Filed 2003·Granted Jan 30, 2007·42 cites·20 claims
- 2393US6861191B2Dry toner for developing electrostatic imagesRICOH KK·Filed 2002·Granted Mar 1, 2005·45 cites·18 claims
- 2493US5554478AElectrophotographic dry tonerRICOH KK·Filed 1994·Granted Sep 10, 1996·69 cites·7 claims
- 2593US4074001AFixing roll for electrophotographySHINETSU CHEMICAL CO·Filed 1976·Granted Feb 14, 1978·48 cites·7 claims
- 2692US4172976AHeat roller fixing apparatusRICOH KK·Filed 1977·Granted Oct 30, 1979·30 cites·2 claims
- 2791US7566521B2Toner, developer, toner container, process cartridge, image forming apparatus, and image forming methodRICOH KK·Filed 2007·Granted Jul 28, 2009·11 cites·16 claims
- 2891US7172844B2Toner for electrophotography, and image forming process, process cartridge and image forming apparatus using the sameRICOH KK·Filed 2004·Granted Feb 6, 2007·36 cites·15 claims
- 2991US5545381ADevice for regenerating printed sheet-like recording mediumRICOH KK·Filed 1992·Granted Aug 13, 1996·68 cites·17 claims
- 3091US4284875AHeat roller fixing apparatusRICHO COMPANY LTD·Filed 1979·Granted Aug 18, 1981·28 cites·11 claims
- 3190US4841331ATriboelectric charge application member for tonerRICOH KK·Filed 1988·Granted Jun 20, 1989·36 cites·11 claims
- 3289US5061588ADry type toner for electrophotographyRICOH KK·Filed 1989·Granted Oct 29, 1991·36 cites·17 claims
- 3388US7163773B2Toner for developing electrostatic image, developer, process for forming image, and image forming apparatusRICOH KK·Filed 2003·Granted Jan 16, 2007·27 cites·19 claims
- 3487US5612766ADevice for regenerating printed sheet-like recording mediumRICOH KK·Filed 1995·Granted Mar 18, 1997·48 cites·14 claims
- 3585US7368212B2Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of tonerRICOH KK·Filed 2004·Granted May 6, 2008·23 cites·18 claims
- 3685US5975446APulverizing apparatusRICOH KK·Filed 1996·Granted Nov 2, 1999·38 cites·4 claims
- 3783US7288353B2Toner, developer, image developer and image forming apparatusRICOH KK·Filed 2004·Granted Oct 30, 2007·18 cites·17 claims
- 3881US7939235B2Image formation methodRICOH CO LTD·Filed 2008·Granted May 10, 2011·6 cites·3 claims
- 3981US7611815B2External additive for toner for electrophotography, toner for electrophotography, double-component developer for electrophotography, image-forming process using the toner, and image-forming apparatus using the tonerRICOH KK·Filed 2003·Granted Nov 3, 2009·15 cites·16 claims
- 4080US4945022ATriboelectric charge application member for toner comprising copolymer of fluoro-olefin monomer and unsaturated silicon monomerRICOH KK·Filed 1989·Granted Jul 31, 1990·21 cites·22 claims
- 4179US5344732AMulti-color electrophotographic image formation methodRICOH KK·Filed 1993·Granted Sep 6, 1994·28 cites·12 claims
- 4277US7749674B2Toner, developer, image developer and image forming apparatusRICOH KK·Filed 2007·Granted Jul 6, 2010·4 cites·13 claims
- 4377US7442484B2Image forming method using tonerRICOH KK·Filed 2004·Granted Oct 28, 2008·16 cites·13 claims
- 4471USRE37197EDevice for regenerating printed sheet-like recording mediumRICOH KK·Filed 1998·Granted May 29, 2001·21 cites·45 claims
- 4570US8211605B2Toner, developer, toner container, process cartridge, image forming method, and image forming apparatusYAMADA HIROSHI·Filed 2008·Granted Jul 3, 2012·3 cites·15 claims
- 4664US7547497B2Toner, and developer, image developer and image forming apparatus using the tonerRICOH KK·Filed 2005·Granted Jun 16, 2009·2 cites·11 claims
- 4755US7642032B2Toner, developer, image forming apparatus and image forming methodRICOH KK·Filed 2004·Granted Jan 5, 2010·5 cites·10 claims
- 4842US7935469B2Image forming method and toner for developing latent electrostatic imageRICOH CO LTD·Filed 2008·Granted May 3, 2011·0 cites·10 claims
- 4935US2004072091A1Developer for developing electrostatic image, image forming apparatus and image forming methodFiled 2003·Application pending·0 cites
- 5033US2003152857A1Toner, developer, image-forming method and image-forming deviceFiled 2002·Application pending·0 cites
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →