Inventor · disambiguated record
Koichi Tanigawa
Also filed as: ISHIHARA TAKAYUKI · TANIGAWA KOICHI
45 granted patents·3 pending applications·1,325 citations·filing 1976–2021
99Inventor score
Top patents by PatentIndex Score
48 records- 0197US5438398AImage forming apparatus with intermediate transfer memberCANON KK·Filed 1994·Granted Aug 1, 1995·72 cites·43 claims
- 0297US5331385AFixing rotatable member having conductive parting layer and fixing apparatus using sameCANON KK·Filed 1991·Granted Jul 19, 1994·80 cites·8 claims
- 0395US5253022AImage forming apparatusCANON KK·Filed 1990·Granted Oct 12, 1993·62 cites·40 claims
- 0495US5179397AImage forming apparatus with constant voltage and constant current controlCANON KK·Filed 1990·Granted Jan 12, 1993·65 cites·128 claims
- 0593US5450181AFixing deviceCANON KK·Filed 1994·Granted Sep 12, 1995·53 cites·49 claims
- 0693US5235386ACharging device having charging member, process cartridge and image forming apparatusCANON KK·Filed 1992·Granted Aug 10, 1993·47 cites·20 claims
- 0792US5177549AImage forming apparatus supplied with controllable bias voltageCANON KK·Filed 1991·Granted Jan 5, 1993·45 cites·8 claims
- 0891US5732314AImage forming apparatus comprising image bearing member, intermediate image transfer member and secondary image transfer member for facilitating transfer of developed image from intermediate image transfer member to transfer materialCANON KK·Filed 1994·Granted Mar 24, 1998·42 cites·28 claims
- 0991US5519475AImage forming apparatus with peripheral speed difference between image bearing and transfer membersCANON KK·Filed 1994·Granted May 21, 1996·41 cites·2 claims
- 1090USD618810SMedical patchHISAMITSU PHARMACEUTICAL CO·Filed 2007·Granted Jun 29, 2010·71 cites·1 claims
- 1189US6031215AImage heating device using induction heating for image heatingCANON KK·Filed 1997·Granted Feb 29, 2000·46 cites·23 claims
- 1289US5153654AImage forming apparatus having transfer member for carrying transfer materialCANON KK·Filed 1991·Granted Oct 6, 1992·38 cites·11 claims
- 1389US4385829AImage developing method and device thereforCANON KK·Filed 1981·Granted May 31, 1983·33 cites·20 claims
- 1488US5159393AImage forming apparatus having transfer device and image bearing member traveling at different speedsCANON KK·Filed 1990·Granted Oct 27, 1992·37 cites·30 claims
- 1588US4341457AElectrophotographic apparatus including an electrostatic separation deviceCANON KK·Filed 1980·Granted Jul 27, 1982·30 cites·31 claims
- 1687US6347211B2Fixing apparatus preventing leakage of electric current from inner surface of fixing rollerCANON KK·Filed 1999·Granted Feb 12, 2002·34 cites·5 claims
- 1787US5659857AImage forming methodCANON KK·Filed 1994·Granted Aug 19, 1997·35 cites·41 claims
- 1885US5223900ATransfer roller with a resistance determined in accordance with its peripheral speedCANON KK·Filed 1991·Granted Jun 29, 1993·30 cites·11 claims
- 1983US6005594AFixing apparatus having a fixing roller with a non-adhesive surface layerCANON KK·Filed 1995·Granted Dec 21, 1999·30 cites·30 claims
- 2082US5412455ACharging device, image forming apparatus and detachably mountable process cartridge having a constant voltage power source featureCANON KK·Filed 1993·Granted May 2, 1995·26 cites·13 claims
- 2182US4482240AElectrophotographic process utilizing electrostatic separation and apparatus thereforCANON KK·Filed 1982·Granted Nov 13, 1984·23 cites·16 claims
- 2281US5715498AColor image forming apparatus and method for forming a color image corrected for aberration in registration of image stations for each colorCANON KK·Filed 1995·Granted Feb 3, 1998·75 cites·20 claims
- 2380US5321482AProcess cartridge and image forming apparatus including a lubricant provided on a cleaning member for cleaning an image bearing memberCANON KK·Filed 1992·Granted Jun 14, 1994·22 cites·33 claims
- 2479US4370049AImage developing deviceCANON KK·Filed 1981·Granted Jan 25, 1983·21 cites·15 claims
- 2578US5493380AFixing device with means for limiting a distance between heating and pressing memberCANON KK·Filed 1994·Granted Feb 20, 1996·23 cites·10 claims
- 2673US5918096AImage transfer apparatusCANON KK·Filed 1997·Granted Jun 29, 1999·22 cites·16 claims
- 2772US5970299AImage heating apparatusCANON KK·Filed 1998·Granted Oct 19, 1999·33 cites·30 claims
- 2872US4346986AImage formation method and apparatusCANON KK·Filed 1981·Granted Aug 31, 1982·16 cites·8 claims
- 2966US5519471ADeveloper carrying member utilizing oscillating bias having constant-voltage-DC component and constant-current AC component, and developing apparatus and image forming apparatus using sameCANON KK·Filed 1993·Granted May 21, 1996·14 cites·15 claims
- 3066US4193681ALiquid feeding deviceCANON KK·Filed 1978·Granted Mar 18, 1980·11 cites·11 claims
- 3165USD686735SMedical patchTSURUTA MITSUTOSHI·Filed 2010·Granted Jul 23, 2013·17 cites·1 claims
- 3265US5940668AImage forming apparatus with voltage polarity switching meansCANON KK·Filed 1997·Granted Aug 17, 1999·14 cites·8 claims
- 3362US4456825AMethod of and device for charging by corona dischargeCANON KK·Filed 1982·Granted Jun 26, 1984·11 cites·13 claims
- 3462US4109289ACorona dischargerCANON KK·Filed 1976·Granted Aug 22, 1978·12 cites·8 claims
- 3553US5589924AElectrophotographic image forming systemCANON KK·Filed 1995·Granted Dec 31, 1996·9 cites·22 claims
- 3651US4972209AImage recording forming blanks in peripheral edgesCANON KK·Filed 1989·Granted Nov 20, 1990·10 cites·27 claims
- 3750US4468110AMethod and apparatus for electrophotographyCANON KK·Filed 1982·Granted Aug 28, 1984·7 cites·9 claims
- 3849US5850245APage printerCANON KK·Filed 1995·Granted Dec 15, 1998·16 cites·19 claims
- 3947US5983107AMobile radio communications systemHITACHI LTD·Filed 1997·Granted Nov 9, 1999·24 cites·25 claims
- 4047US2014192243A1Image pickup device, method of manufacturing same, and electronic apparatusSONY CORP·Filed 2014·Application pending·0 cites
- 4145US5659840ADeveloping method using developing electric field having back-transfer, transfer and rest stepsCANON KK·Filed 1995·Granted Aug 19, 1997·7 cites·17 claims
- 4244US11562774B2Semiconductor device having a memory and method of controlling the same between operation modesRENESAS ELECTRONICS CORP·Filed 2021·Granted Jan 24, 2023·0 cites·10 claims
- 4344US4599080AMethod for folding jacket material for disk or the likeOM LTD·Filed 1985·Granted Jul 8, 1986·7 cites·2 claims
- 4439US4965747AImage forming apparatusCANON KK·Filed 1989·Granted Oct 23, 1990·6 cites·58 claims
- 4538US4559030AApparatus for folding jacket materialOM LTD·Filed 1983·Granted Dec 17, 1985·4 cites·3 claims
- 4637US5157442AImage forming apparatusCANON KK·Filed 1990·Granted Oct 20, 1992·4 cites·17 claims
- 4737US2006012539A1Display deviceMATSUHIRA TSUTOMU·Filed 2005·Application pending·0 cites
- 4833US2004179408A1MicrocomputerRENESAS TECH CORP·Filed 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →