Inventor · disambiguated record
Katsuichi Ohta
Also filed as: OHTA KATSUICHI
21 granted patents·2 pending applications·690 citations·filing 1986–2008
96Inventor score
Top patents by PatentIndex Score
23 records- 0198US6326112B1Electrophotographic photoreceptor, and process cartridge and image forming apparatus using the photoreceptorRICOH KK·Filed 2000·Granted Dec 4, 2001·117 cites·18 claims
- 0297US6641964B2Electrophotographic photoreceptor, method for manufacturing the photoreceptor, and image forming method and apparatus using the photoreceptorRICOH KK·Filed 2001·Granted Nov 4, 2003·80 cites·24 claims
- 0395US4775605ALayered photosensitive material for electrophotographyRICOH KK·Filed 1986·Granted Oct 4, 1988·75 cites·15 claims
- 0493US6707480B2Image formation unit including stored performance informationRICOH KK·Filed 2002·Granted Mar 16, 2004·50 cites·7 claims
- 0593US5578405AElectrophotographic photoconductor containing disazo and trisazo pigmentsRICOH KK·Filed 1994·Granted Nov 26, 1996·125 cites·55 claims
- 0692US6844124B2Electrophotographic photoreceptor, method for manufacturing the photoreceptor, and image forming method and apparatus using the photoreceptorRICOH KK·Filed 2003·Granted Jan 18, 2005·31 cites·9 claims
- 0789US5105222AElectrophotographic copying apparatus having photoconductor with magnetic layerRICOH KK·Filed 1991·Granted Apr 14, 1992·42 cites·15 claims
- 0888US7670743B2Image forming methodRICOH KK·Filed 2008·Granted Mar 2, 2010·8 cites·38 claims
- 0986US5370954APhotoconductive composition containing trisazo and disazo compoundsRICOH KK·Filed 1993·Granted Dec 6, 1994·25 cites·20 claims
- 1084US7824830B2Coating liquid and electrophotographic photoreceptor prepared using the coating liquidRICOH KK·Filed 2005·Granted Nov 2, 2010·5 cites·33 claims
- 1182US7177570B2Measurement of frictional resistance of photoconductor against belt in image forming apparatus, process cartridge, and image forming methodRICOH KK·Filed 2004·Granted Feb 13, 2007·20 cites·40 claims
- 1281US4863822AElectrophotographic photoconductor comprising charge generating and transport layers containing adjuvantsRICOH KK·Filed 1988·Granted Sep 5, 1989·24 cites·31 claims
- 1380US4822705AElectrophotographic photoconductor with layer preventing charge injectionRICOH KK·Filed 1988·Granted Apr 18, 1989·24 cites·10 claims
- 1477US7507511B2Electrophotographic photoreceptor, and image forming apparatus and process cartridge therefor using the electrophotographic photoreceptorRICOH KK·Filed 2006·Granted Mar 24, 2009·5 cites·27 claims
- 1574US4906545AElectrophotographic photoconductor with undercoat layer containing metal oxide on supportRICOH KK·Filed 1988·Granted Mar 6, 1990·18 cites·15 claims
- 1673US7955768B2Electrophotographic photoconductor and method for producing the same, image forming apparatus, and process cartridgeRICOH CO LTD·Filed 2007·Granted Jun 7, 2011·4 cites·17 claims
- 1772US7560203B2Electrophotographic photoreceptor, method of image formation, image formation apparatus and process cartridge for image formation apparatusRICOH KK·Filed 2004·Granted Jul 14, 2009·12 cites·50 claims
- 1871US7534538B2Coating liquid for intermediate layer in electrophotographic photoconductor, electrophotographic photoconductor utilizing the same, image forming apparatus and process cartridge for image forming apparatusRICOH KK·Filed 2005·Granted May 19, 2009·3 cites·19 claims
- 1963US7371491B2Electrophotographic photoreceptor, method for manufacturing the electrophotographic photoreceptor, and image forming apparatus and process cartridge using the electrophotographic photoreceptorRICOH KK·Filed 2004·Granted May 13, 2008·8 cites·28 claims
- 2061US7371490B2Photoconductor, image forming apparatus, image forming process, and process cartridgeRICOH KK·Filed 2004·Granted May 13, 2008·7 cites·21 claims
- 2147US2006197823A1Image forming apparatusOHTA KATSUICHI·Filed 2006·Application pending·0 cites
- 2246US5863683AElectrophotographic photoconductor containing charge generating azo pigment subjected to a salt-milling processRICOH KK·Filed 1996·Granted Jan 26, 1999·7 cites·14 claims
- 2339US2008227007A1Image forming apparatus and process cartridgeRICOH KK·Filed 2008·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →