Inventor · disambiguated record
Hiroshi Nakai
Also filed as: NAKAI HIROSHI
127 granted patents·18 pending applications·1,744 citations·filing 1974–2024
99Inventor score
Top patents by PatentIndex Score
145 records- 0199US6468706B2Two-component developer, container filled with the two-component developer, and image formation apparatusRICOH KK·Filed 2001·Granted Oct 22, 2002·130 cites·20 claims
- 0298US6667141B2Image forming method and apparatusRICOH KK·Filed 2002·Granted Dec 23, 2003·98 cites·19 claims
- 0397US7251437B2Image formation apparatus having a body to be charged with specified properties and including the use of a protective materialRICOH KK·Filed 2005·Granted Jul 31, 2007·44 cites·24 claims
- 0496US10493762B2Inkjet printing apparatusCANON KK·Filed 2018·Granted Dec 3, 2019·9 cites·11 claims
- 0596US8714065B2Punching dieTAKAHASHI YUKIO·Filed 2005·Granted May 6, 2014·26 cites·2 claims
- 0696US7620336B2Apparatus and method for fixing an imageRICOH KK·Filed 2005·Granted Nov 17, 2009·21 cites·38 claims
- 0796US7383013B2Image forming apparatus using a contact or a proximity type of charging system including a protection substance on a moveable body to be chargedRICOH KK·Filed 2007·Granted Jun 3, 2008·18 cites·5 claims
- 0896US6699632B2Image forming toner, and image forming method and image forming apparatus using the tonerRICOH KK·Filed 2001·Granted Mar 2, 2004·72 cites·20 claims
- 0996US6593048B2Two-component developer, and image forming apparatus and image forming method using the developerRICOH KK·Filed 2001·Granted Jul 15, 2003·97 cites·20 claims
- 1096US6544704B1Two-component developer, container filled with the two-component developer, and image formation apparatusRICOH KK·Filed 2002·Granted Apr 8, 2003·59 cites·20 claims
- 1195US8081916B2Protective agent for image bearing member, protective layer setting unit, and process cartridgeTANAKA SHINYA·Filed 2009·Granted Dec 20, 2011·12 cites·22 claims
- 1295US7653339B2Protective agent, image forming apparatus, and process cartridgeRICOH KK·Filed 2007·Granted Jan 26, 2010·18 cites·18 claims
- 1395US7212753B2Image forming apparatus and process cartridgeRICOH KK·Filed 2005·Granted May 1, 2007·23 cites·13 claims
- 1495US7103301B2Image forming apparatus using a contact or a proximity type of charging system including a protection substance on a moveable body to be chargedRICOH KK·Filed 2004·Granted Sep 5, 2006·47 cites·10 claims
- 1595US6030736AElectrophotographic photoconductor with polysiloxane mixtureRICOH KK·Filed 1998·Granted Feb 29, 2000·87 cites·16 claims
- 1694US10543680B2Inkjet printing apparatus and ejecting methodCANON KK·Filed 2018·Granted Jan 28, 2020·5 cites·15 claims
- 1794US6811944B2Toner, method for manufacturing the toner, and image forming method and apparatus using the tonerRICOH KK·Filed 2004·Granted Nov 2, 2004·36 cites·4 claims
- 1893US10894416B2Inkjet printing apparatus and ink filling methodCANON KK·Filed 2019·Granted Jan 19, 2021·4 cites·13 claims
- 1992US7979017B2Image-bearing member protecting agent, protective layer forming device, image forming method, image forming apparatus and process cartridgeRICOH CO LTD·Filed 2009·Granted Jul 12, 2011·12 cites·17 claims
- 2092US7941087B2Image-bearing member protecting agent, protective layer forming device, image forming method, image forming apparatus and process cartridgeRICOH CO LTD·Filed 2009·Granted May 10, 2011·12 cites·17 claims
- 2192US6790575B2Two-component developer, image forming apparatus, and image forming methodRICOH KK·Filed 2002·Granted Sep 14, 2004·43 cites·20 claims
- 2292US5670071AMAG arc welding apparatusDAIHEN CORP·Filed 1995·Granted Sep 23, 1997·91 cites·12 claims
- 2391US7970334B2Image-carrier protecting agent, protecting-layer forming device, image forming method, image forming apparatus, and process cartridgeRICOH CO LTD·Filed 2007·Granted Jun 28, 2011·12 cites·17 claims
- 2491US6813461B2Toner, method for manufacturing the toner, and image forming method and apparatus using the tonerRICOH KK·Filed 2004·Granted Nov 2, 2004·26 cites·9 claims
- 2590US10514651B1Cleaning blade, cleaning device, image forming apparatus, and process cartridgeWATANABE KAZUHIKO·Filed 2019·Granted Dec 24, 2019·6 cites·20 claims
- 2690US6911289B2Toner, method for manufacturing the toner, and image forming method and apparatus using the tonerRICOH KK·Filed 2001·Granted Jun 28, 2005·26 cites·19 claims
- 2789US8219017B2Image forming apparatus and process cartridgeNAKAI HIROSHI·Filed 2010·Granted Jul 10, 2012·6 cites·14 claims
- 2889US6523933B1Media cartridge and image recording apparatus with detachably mountable media cartridgeCANON KK·Filed 2000·Granted Feb 25, 2003·35 cites·112 claims
- 2988US10113891B2Flow rate measurement devicePANASONIC IP MAN CO LTD·Filed 2016·Granted Oct 30, 2018·3 cites·3 claims
- 3088US8676108B2Protecting agent supplying member, protective layer forming device, and image forming apparatusHASEGAWA KUNIO·Filed 2011·Granted Mar 18, 2014·5 cites·20 claims
- 3188US7251438B2Image forming apparatus using a contact or a proximity type of charging system including a protection substance on a moveable body to be chargedRICOH KK·Filed 2006·Granted Jul 31, 2007·8 cites·6 claims
- 3287US8080096B2Protecting agent for image bearing member and production method therefor, protection layer forming apparatus, image forming method, image forming apparatus, and process cartridgeYAMASHITA MASAHIDE·Filed 2007·Granted Dec 20, 2011·9 cites·10 claims
- 3387US7991342B2Protective material and image forming apparatus using the protective materialRICOH CO LTD·Filed 2009·Granted Aug 2, 2011·8 cites·20 claims
- 3486US9272543B2Printing device, tray and conveyance deviceCANON KK·Filed 2014·Granted Mar 1, 2016·4 cites·15 claims
- 3586US8452222B2Image-bearing member protecting agent, protective layer forming device, image forming method, image forming apparatus, and process cartridgeTANAKA SHINYA·Filed 2010·Granted May 28, 2013·4 cites·21 claims
- 3685US6856781B2Image forming apparatus and method of developing an electrostatic latent imageRICOH KK·Filed 2002·Granted Feb 15, 2005·25 cites·20 claims
- 3785US5364195ASheet conveying apparatus with displaceable guide between cassette and feed rollerCANON KK·Filed 1992·Granted Nov 15, 1994·33 cites·12 claims
- 3884US7029816B2Electrographic image formation methodRICOH KK·Filed 2004·Granted Apr 18, 2006·20 cites·3 claims
- 3983US8437676B2Image-bearing member protecting agent, method of applying an image-bearing member protecting agent, protective layer forming device, image forming method, process cartridge, and image forming apparatusTANAKA SHINYA·Filed 2010·Granted May 7, 2013·3 cites·17 claims
- 4082US8081917B2Image-bearing member protecting agent, protective layer forming device, process cartridge and image forming apparatusNAKAI HIROSHI·Filed 2009·Granted Dec 20, 2011·6 cites·7 claims
- 4182US5476402AIntake and exhaust structure for V-type engineSANSHIN KOGYO KK·Filed 1994·Granted Dec 19, 1995·39 cites·21 claims
- 4281US9528624B2Shutoff valve deviceNAGANUMA NAOTO·Filed 2012·Granted Dec 27, 2016·6 cites·7 claims
- 4380USD832123SFlow meterPANASONIC IP MAN CO LTD·Filed 2017·Granted Oct 30, 2018·19 cites·1 claims
- 4480US8285188B2Protective agent for image bearing member, protective layer setting unit, and process cartridgeTANAKA SHINYA·Filed 2011·Granted Oct 9, 2012·1 cites·15 claims
- 4580US4271490AUltrasonic detection systemFURUNO ELECTRIC CO·Filed 1978·Granted Jun 2, 1981·35 cites·17 claims
- 4678US8649723B2Protective agent feeding member, protective layer forming apparatus, and image forming apparatusHASEGAWA KUNIO·Filed 2012·Granted Feb 11, 2014·2 cites·10 claims
- 4778US8494429B2Image forming apparatus and process cartridgeSEO KUMIKO·Filed 2010·Granted Jul 23, 2013·4 cites·19 claims
- 4877US11794479B2Inkjet printing apparatus and recovery methodCANON KK·Filed 2022·Granted Oct 24, 2023·0 cites·12 claims
- 4977US8351838B2Image bearing member-protecting agent, protecting agent supplying device, process cartridge, image forming apparatus and image forming methodRICOH CO LTD·Filed 2010·Granted Jan 8, 2013·2 cites·12 claims
- 5077US5827455AEngine choke controlSANSHIN KOGYO KK·Filed 1996·Granted Oct 27, 1998·32 cites·14 claims
Showing the top 50 of 145 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →