Inventor · disambiguated record
Koji Yamaguchi
Also filed as: YAMAGUCHI KOJI
203 granted patents·58 pending applications·3,983 citations·filing 1976–2025
99Inventor score
Files withCANON KK64AUTONETWORKS TECHNOLOGIES LTD23SEIKO EPSON CORP17MITSUBISHI ELECTRIC CORP12TOSHIBA KK9
Top patents by PatentIndex Score
261 records- 0199US9494890B2Developing cartridge, process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Nov 15, 2016·56 cites·15 claims
- 0299US7194225B2Process cartridge and image forming apparatusCANON KK·Filed 2005·Granted Mar 20, 2007·55 cites·10 claims
- 0399US7136604B2Process cartridge having electrical contact connectable to electrical contact in electrophotographic image forming apparatusCANON KK·Filed 2005·Granted Nov 14, 2006·196 cites·16 claims
- 0499US7116925B2Process cartridge and image forming apparatusCANON KK·Filed 2005·Granted Oct 3, 2006·76 cites·9 claims
- 0599US6681088B2Process cartridge, image forming apparatus and separating mechanism for separating developing member from photosensitive drumCANON KK·Filed 2002·Granted Jan 20, 2004·250 cites·20 claims
- 0698US11762330B2Drum unit, cartridge and coupling memberCANON KK·Filed 2021·Granted Sep 19, 2023·3 cites·8 claims
- 0798US9302801B2Developer accommodating unit, manufacturing method thereof, process cartridge and image forming apparatusCANON KK·Filed 2015·Granted Apr 5, 2016·30 cites·15 claims
- 0898US9291942B2Developer accommodating unit, process cartridge and image forming apparatusCANON KK·Filed 2014·Granted Mar 22, 2016·26 cites·18 claims
- 0998US9152081B2Developer accommodating container, process cartridge, electrophotographic image forming apparatusCANON KK·Filed 2013·Granted Oct 6, 2015·29 cites·38 claims
- 1098US9063464B2Developer containing unit, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2013·Granted Jun 23, 2015·37 cites·22 claims
- 1198US8577252B2Process cartridge and disassembling method of the process cartridgeANAN OSAMU·Filed 2010·Granted Nov 5, 2013·54 cites·6 claims
- 1298US7477865B2Process cartridge and image forming apparatusCANON KK·Filed 2007·Granted Jan 13, 2009·36 cites·10 claims
- 1398US7319834B2Process cartridge and image forming apparatusCANON KK·Filed 2006·Granted Jan 15, 2008·41 cites·8 claims
- 1498US6961528B2Cartridge and electrophotographic image forming apparatusCANON KK·Filed 2004·Granted Nov 1, 2005·88 cites·20 claims
- 1598US6834173B2Image-forming-apparatus process cartridge having a locking portion to prevent the cartridge from disengaging from the image forming apparatus and an image forming apparatus mounting such a cartridgeCANON KK·Filed 2002·Granted Dec 21, 2004·107 cites·22 claims
- 1698US6782219B2Cartridge and electrophotographic image forming apparatusCANON KK·Filed 2002·Granted Aug 24, 2004·101 cites·21 claims
- 1797US11061366B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 13, 2021·8 cites·30 claims
- 1897US11061364B2Drum unit, cartridge and coupling memberCANON KK·Filed 2017·Granted Jul 13, 2021·7 cites·142 claims
- 1997US10955796B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Mar 23, 2021·6 cites·30 claims
- 2097US10948871B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Mar 16, 2021·6 cites·30 claims
- 2197US9383678B2Developer accommodating container, process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Jul 5, 2016·25 cites·13 claims
- 2297US9341983B2Developer accommodating unit, developing device, process cartridge and image forming apparatusCANON KK·Filed 2014·Granted May 17, 2016·22 cites·17 claims
- 2397US9304441B2Developer accommodating container, developer accommodating unit, process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Apr 5, 2016·21 cites·48 claims
- 2497US9285707B2Developer accommodating unit with a urging member for urging a flexible memberCANON KK·Filed 2012·Granted Mar 15, 2016·25 cites·22 claims
- 2597US8121519B2Process cartridge having cartridge positioning portion and image forming apparatus mounting said process cartridgeYAMAGUCHI KOJI·Filed 2010·Granted Feb 21, 2012·31 cites·7 claims
- 2697US7792460B2Process cartridge having cartridge positioning portion and image forming apparatus mounting said process cartridgeCANON KK·Filed 2009·Granted Sep 7, 2010·35 cites·3 claims
- 2797US7519310B2Process cartridge having cartridge positioning portion and movable member and image forming apparatus mounting said process cartridgeCANON KK·Filed 2006·Granted Apr 14, 2009·39 cites·4 claims
- 2897US7184687B2Process cartridge mountable to image forming apparatus having positioning portion to engage a member of the apparatus and having member to contact urging member of the apparatus and such image forming apparatusCANON KK·Filed 2006·Granted Feb 27, 2007·48 cites·7 claims
- 2997US6947687B2Cartridge having locking portion for locking cartridge with an image forming apparatus and releasing portion to release the locking portion, and image forming apparatus having such a cartridgeCANON KK·Filed 2003·Granted Sep 20, 2005·88 cites·12 claims
- 3096US11360416B2Image forming apparatusCANON KK·Filed 2020·Granted Jun 14, 2022·4 cites·17 claims
- 3196US11073791B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 27, 2021·5 cites·21 claims
- 3296US11073790B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 27, 2021·5 cites·30 claims
- 3396US11067948B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 20, 2021·5 cites·30 claims
- 3496US11067947B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 20, 2021·5 cites·29 claims
- 3596US11061367B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 13, 2021·5 cites·30 claims
- 3696US11061368B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Jul 13, 2021·5 cites·27 claims
- 3796US9465356B2Image forming apparatus with opening for positioning or regulating a supporting member that supports an image bearing memberYAMAGUCHI KOJI·Filed 2011·Granted Oct 11, 2016·18 cites·24 claims
- 3896US7068965B2Developing cartridge, side cover mounting method and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Jun 27, 2006·77 cites·22 claims
- 3996US6983115B2Developing cartridge and process cartridge having first and second projected portions and image forming apparatus mounting such a developing cartridgeCANON KK·Filed 2003·Granted Jan 3, 2006·79 cites·19 claims
- 4096US6915092B2Process cartridge remanufacturing methodCANON KK·Filed 2003·Granted Jul 5, 2005·68 cites·6 claims
- 4196US5632002ASpeech recognition interface system suitable for window systems and speech mail systemsTOSHIBA KK·Filed 1993·Granted May 20, 1997·392 cites·56 claims
- 4295US11334023B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted May 17, 2022·3 cites·29 claims
- 4395US8867955B2Developer accommodating unit, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2012·Granted Oct 21, 2014·34 cites·7 claims
- 4495US6916725B2Method for manufacturing semiconductor device, and method for manufacturing semiconductor moduleSEIKO EPSON CORP·Filed 2004·Granted Jul 12, 2005·109 cites·8 claims
- 4594US11878641B2Arrangement structure of wiring memberAUTONETWORKS TECHNOLOGIES LTD·Filed 2020·Granted Jan 23, 2024·4 cites·5 claims
- 4693US5818436AApparatus and method for playing back continuous dataTOSHIBA KK·Filed 1997·Granted Oct 6, 1998·97 cites·24 claims
- 4792US7452440B1Method and device for producing laminated compositeSEKISUI CHEMICAL CO LTD·Filed 2006·Granted Nov 18, 2008·16 cites·5 claims
- 4892US7223634B2Semiconductor device, method for manufacturing the same, circuit board, and electronic apparatusSEIKO EPSON CORP·Filed 2004·Granted May 29, 2007·70 cites·16 claims
- 4991US12287603B2Drum unit, cartridge and coupling memberCANON KK·Filed 2024·Granted Apr 29, 2025·0 cites·18 claims
- 5091US11442404B2Drum unit, cartridge and coupling memberCANON KK·Filed 2019·Granted Sep 13, 2022·1 cites·30 claims
Showing the top 50 of 261 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →