Inventor · disambiguated record
Katsumi Kumada
Also filed as: KUMADA KATSUMI
15 granted patents·213 citations·filing 1991–2010
93Inventor score
Top patents by PatentIndex Score
15 records- 0193US8131197B2Fixing device and electro photographic apparatus using the sameHIRAOKA CHIKARA·Filed 2008·Granted Mar 6, 2012·21 cites·20 claims
- 0292US7804628B2Image forming apparatus with an open-close regulation mechanism of the automatic document feederRICOH PRINTING SYSETMS INC·Filed 2006·Granted Sep 28, 2010·41 cites·20 claims
- 0390US6094549AElectrograph apparatus enabling removal of offensive substancesHITACHI LTD·Filed 1998·Granted Jul 25, 2000·55 cites·11 claims
- 0485US7758040B2Sheet feed cassette and image forming apparatus using the sameRICOH KK·Filed 2007·Granted Jul 20, 2010·10 cites·17 claims
- 0584US8073375B2Fixing unit and image forming apparatus having the sameHIRAOKA CHIKARA·Filed 2008·Granted Dec 6, 2011·8 cites·8 claims
- 0680US5491537ADeveloping apparatus having developing agent accommodating cartridge and cartridge for accommodating developing agent for use in developing apparatusHITACHI LTD·Filed 1993·Granted Feb 13, 1996·22 cites·13 claims
- 0778US5345301AImage fixing device and electrophotographic apparatus incorporated with such deviceHITACHI LTD·Filed 1991·Granted Sep 6, 1994·23 cites·10 claims
- 0876US7570898B2Image forming apparatus including a wiring housing memberRICOH KK·Filed 2006·Granted Aug 4, 2009·5 cites·20 claims
- 0975US7970311B2Developing device and image forming apparatus using the sameRICOH CO LTD·Filed 2007·Granted Jun 28, 2011·4 cites·17 claims
- 1072US8417155B2Swing-gear mechanism and image forming apparatus having multiple speed modesFUKUSHIMA TATSUO·Filed 2010·Granted Apr 9, 2013·4 cites·20 claims
- 1163US7983596B2Housing structure and image forming apparatusRICOH CO LTD·Filed 2009·Granted Jul 19, 2011·2 cites·13 claims
- 1259US6661994B2Electrophotographic image forming systemHITACHI LTD·Filed 2002·Granted Dec 9, 2003·6 cites·5 claims
- 1359US6400923B1Fixing device improved in offset-preventionHITACHI LTD·Filed 2000·Granted Jun 4, 2002·8 cites·19 claims
- 1445US7925193B2Rotary member, developing device, and image forming apparatusRICOH CO LTD·Filed 2008·Granted Apr 12, 2011·0 cites·17 claims
- 1540US5604572ADeveloping apparatus having developing agent accommodating cartridge and cartridge for accommodating developing agent for use in developing apparatusHITACHI LTD·Filed 1995·Granted Feb 18, 1997·4 cites·11 claims
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