Inventor · disambiguated record
Tomoji Ishikawa
Also filed as: ISHIKAWA TOMOJI
42 granted patents·1,792 citations·filing 1990–2016
99Inventor score
Top patents by PatentIndex Score
42 records- 0199US7072602B2Image forming apparatus and image forming unitRICOH KK·Filed 2004·Granted Jul 4, 2006·122 cites·20 claims
- 0298US6336020B1Image forming apparatus having an improved developer-supplying mechanism and method thereofRICOH KK·Filed 2000·Granted Jan 1, 2002·86 cites·7 claims
- 0398US5109254ADeveloping apparatusRICOH KK·Filed 1990·Granted Apr 28, 1992·101 cites·22 claims
- 0497US8532542B2Toner container and manufacturing method for toner containerMITSUISHI KAORI·Filed 2010·Granted Sep 10, 2013·21 cites·41 claims
- 0597US8311447B2Toner container and manufacturing method for toner containerMITSUISHI KAORI·Filed 2011·Granted Nov 13, 2012·24 cites·21 claims
- 0697US6104900AImage forming apparatus having an improved developer-supplying mechanism and method thereofRICOH KK·Filed 1998·Granted Aug 15, 2000·97 cites·21 claims
- 0797US5765059ADeveloping device for image forming apparatus and toner container thereforRICOH KK·Filed 1995·Granted Jun 9, 1998·78 cites·6 claims
- 0896US7162189B2Method and apparatus of image forming and process cartridge included in the apparatusRICOH KK·Filed 2004·Granted Jan 9, 2007·53 cites·43 claims
- 0996US5758235AToner container for a rotary developing deviceRICOH KK·Filed 1997·Granted May 26, 1998·63 cites·3 claims
- 1096US5565973ARotary developing device for an image forming apparatusRICOH KK·Filed 1995·Granted Oct 15, 1996·106 cites·11 claims
- 1196US5416568ADeveloping unit for an image forming apparatusRICOH KK·Filed 1993·Granted May 16, 1995·67 cites·25 claims
- 1296US5235384AImage forming apparatus with replaceable process unitsRICOH KK·Filed 1990·Granted Aug 10, 1993·72 cites·11 claims
- 1395US5991569APC drum integrated revolving type developing unit with pull-out supporterRICOH KK·Filed 1998·Granted Nov 23, 1999·67 cites·31 claims
- 1494US7146122B2Image forming apparatus and image forming unitRICOH KK·Filed 2006·Granted Dec 5, 2006·15 cites·6 claims
- 1594US6122469AImage forming apparatus including a preventing mechanism for preventing a developing unit from rotatingRICOH KK·Filed 1998·Granted Sep 19, 2000·72 cites·16 claims
- 1694US6070037AImage forming apparatus having improved developer limiting memberRICOH KK·Filed 1999·Granted May 30, 2000·71 cites·10 claims
- 1794US5768664AToner container for a rotary developing deviceRICOH KK·Filed 1997·Granted Jun 16, 1998·54 cites·15 claims
- 1893US9170530B2Powder container and image forming apparatus incorporating sameOSHIKAWA YUKI·Filed 2011·Granted Oct 27, 2015·9 cites·19 claims
- 1993US6072967APC drum integrated revolving type developing unit with pull-out supporterRICOH KK·Filed 1999·Granted Jun 6, 2000·51 cites·8 claims
- 2092US5671470AColor image forming device which changes developing bias when switching between developer unitsRICOH KK·Filed 1995·Granted Sep 23, 1997·53 cites·11 claims
- 2191US9213261B2Toner container and manufacturing method for toner containerMITSUISHI KAORI·Filed 2013·Granted Dec 15, 2015·4 cites·69 claims
- 2291US7136610B2Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itselfRICOH KK·Filed 2004·Granted Nov 14, 2006·38 cites·18 claims
- 2391US6256459B1Developing apparatus and image forming apparatus using the same developing apparatus and method of determining end-of-toner conditionRICOH KK·Filed 1999·Granted Jul 3, 2001·51 cites·29 claims
- 2491US5826146AColor image forming device which changes developing bias when switching between developer unitsRICOH KK·Filed 1997·Granted Oct 20, 1998·49 cites·30 claims
- 2588US9529303B2Toner container and manufacturing method for toner containerMITSUISHI KAORI·Filed 2016·Granted Dec 27, 2016·2 cites·18 claims
- 2688US6554590B2High pressure pumpTOYOTA MOTOR CO LTD·Filed 2001·Granted Apr 29, 2003·33 cites·13 claims
- 2788US5787328ARotary developing device for an image forming apparatusRICOH KK·Filed 1997·Granted Jul 28, 1998·33 cites·2 claims
- 2888US5552877AImage forming apparatus with controlled drive for accurately positioning developing sections of a rotary developing deviceRICOH KK·Filed 1995·Granted Sep 3, 1996·45 cites·9 claims
- 2987US9436127B2Toner container and manufacturing method for toner containerMITSUISHI KAORI·Filed 2015·Granted Sep 6, 2016·2 cites·21 claims
- 3087US7062207B2Powder transport apparatus and image forming apparatus that can stabilize replenishment of powderRICOH KK·Filed 2004·Granted Jun 13, 2006·26 cites·24 claims
- 3186US5646721AImage forming apparatus for supplying power to members of a rotary developing deviceRICOH KK·Filed 1995·Granted Jul 8, 1997·34 cites·1 claims
- 3284US7486916B2Method and apparatus of image forming and process cartridge included in the apparatusRICOH KK·Filed 2006·Granted Feb 3, 2009·6 cites·27 claims
- 3383US5940664AAgitation and charging device for an image forming apparatusRICOH KK·Filed 1997·Granted Aug 17, 1999·24 cites·1 claims
- 3483US5617198AImage forming apparatus having rotary developing deviceRICOH KK·Filed 1995·Granted Apr 1, 1997·34 cites·15 claims
- 3582US5761576AImage forming apparatus for supplying power to members of a rotary developing deviceRICOH KK·Filed 1996·Granted Jun 2, 1998·26 cites·21 claims
- 3680US5850586ARotary developing device for an image forming apparatusRICOH KK·Filed 1997·Granted Dec 15, 1998·21 cites·6 claims
- 3778US5956549ARotary developing device for an image forming apparatusRICOH KK·Filed 1997·Granted Sep 21, 1999·19 cites·4 claims
- 3872US7114928B2High-pressure fuel pump and assembly structure of high-pressure pumpTOYOTA MOTOR CO LTD·Filed 2001·Granted Oct 3, 2006·15 cites·3 claims
- 3954US6105883AFuel injector for an internal combustion engineTOYOTA MOTOR CO LTD·Filed 1998·Granted Aug 22, 2000·14 cites·14 claims
- 4052US5796206AController and controlling method for piezoelectric actuatorTOYODA CHUO KENKYUSHO KK·Filed 1996·Granted Aug 18, 1998·12 cites·8 claims
- 4150US6910644B2Solenoid-operated fuel injection valveTOYOTA MOTOR CO LTD·Filed 2002·Granted Jun 28, 2005·4 cites·21 claims
- 4249US6070811AFuel injector for an internal combustion engineTOYOTA MOTOR CO LTD·Filed 1998·Granted Jun 6, 2000·18 cites·5 claims
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