Inventor · disambiguated record
Masaaki Yoshikawa
Also filed as: YOSHIKAWA MASAAKI
186 granted patents·12 pending applications·1,852 citations·filing 1978–2022
99Inventor score
Top patents by PatentIndex Score
198 records- 0197US6892044B2Liquid application apparatus and image formation apparatusRICOH KK·Filed 2002·Granted May 10, 2005·84 cites·8 claims
- 0297US6263185B1Image forming apparatus with a scanner inputRICOH KK·Filed 1999·Granted Jul 17, 2001·72 cites·15 claims
- 0396US8588670B2Fixing device having a reflector and image forming apparatus incorporating sameSHIMOKAWA TOSHIHIKO·Filed 2011·Granted Nov 19, 2013·17 cites·8 claims
- 0496US5839032AImage forming apparatus having selectably controlled sheet discharge pathsRICOH KK·Filed 1997·Granted Nov 17, 1998·128 cites·23 claims
- 0595US6215970B1Duplex unit with recess for retracting manual sheet feeding tray and image forming apparatus using the same duplex unitRICOH KK·Filed 2000·Granted Apr 10, 2001·72 cites·20 claims
- 0695US6134418AImage forming apparatus having a casing mounted to the apparatus at an upper portion of a stacking deviceRICOH KK·Filed 1999·Granted Oct 17, 2000·55 cites·20 claims
- 0795US6112047AImage forming apparatus having a substantially vertical sheet transport path and a relaying mechanism that cooperate to transfer a sheet to a sheet discharge sectionRICOH KK·Filed 1997·Granted Aug 29, 2000·55 cites·29 claims
- 0894US9564262B2Superconducting magnetic field generating device, superconducting magnetic field generating method, and nuclear magnetic resonance apparatusAISIN SEIKI·Filed 2015·Granted Feb 7, 2017·7 cites·13 claims
- 0994US8886101B2Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the sameKAWATA TEPPEI·Filed 2012·Granted Nov 11, 2014·7 cites·17 claims
- 1094US8725038B2Belt assembly, fixing device, and image forming apparatus incorporating sameYAMAGUCHI YOSHIKI·Filed 2011·Granted May 13, 2014·10 cites·18 claims
- 1194US8364052B2Fixing device and image forming apparatus incorporating sameRICOH CO LTD·Filed 2010·Granted Jan 29, 2013·10 cites·7 claims
- 1294US5718196ALubrication and camshaft control system for engineYAMAHA MOTOR CO LTD·Filed 1995·Granted Feb 17, 1998·88 cites·30 claims
- 1393US9727011B2Image forming apparatus and image forming methodIKEBUCHI YUTAKA·Filed 2016·Granted Aug 8, 2017·5 cites·7 claims
- 1493US9448514B2Image forming apparatus and image forming methodIKEBUCHI YUTAKA·Filed 2014·Granted Sep 20, 2016·7 cites·10 claims
- 1593US9031439B2Fixing device and image forming deviceHASE TAKAMASA·Filed 2013·Granted May 12, 2015·7 cites·7 claims
- 1693US8630572B2Fixing device and image forming apparatus including sameFUJIMOTO IPPEI·Filed 2011·Granted Jan 14, 2014·9 cites·10 claims
- 1793US8447220B2Fixing device and image forming apparatus including sameYAMAGUCHI YOSHIKI·Filed 2011·Granted May 21, 2013·8 cites·12 claims
- 1892US9811031B2Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the sameKAWATA TEPPEI·Filed 2015·Granted Nov 7, 2017·4 cites·35 claims
- 1992US9405250B2Fixing device capable of minimizing damage of endless rotary body and image forming apparatus incorporating sameOGAWA TADASHI·Filed 2015·Granted Aug 2, 2016·5 cites·8 claims
- 2092US9046838B2Fixing device and image forming apparatusARAI YUJI·Filed 2013·Granted Jun 2, 2015·6 cites·23 claims
- 2192US8498561B2Fixing device and image forming apparatus incorporating same having a reinforcing member including first and second flangesYAMAGUCHI YOSHIKI·Filed 2010·Granted Jul 30, 2013·7 cites·13 claims
- 2292US5913298AValve timing system for engineYAMAHA MOTOR CO LTD·Filed 1997·Granted Jun 22, 1999·63 cites·19 claims
- 2391US9026024B2Fixing device capable of minimizing damage of endless rotary body and image forming apparatus incorporating sameRICOH CO LTD·Filed 2013·Granted May 5, 2015·5 cites·13 claims
- 2491US8929791B2Fixing device and endless belt assemblyISHII KENJI·Filed 2013·Granted Jan 6, 2015·6 cites·20 claims
- 2591US8682192B2Image forming apparatusIKEBUCHI YUTAKA·Filed 2011·Granted Mar 25, 2014·6 cites·7 claims
- 2691US8311469B2Fixing device and image forming apparatus incorporating sameYOSHIKAWA MASAAKI·Filed 2010·Granted Nov 13, 2012·7 cites·8 claims
- 2791US5094193ACylinder head cooling arrangementYAMAHA MOTOR CO LTD·Filed 1990·Granted Mar 10, 1992·56 cites·17 claims
- 2890US8385804B2Fixing device and image forming apparatus employing the fixing deviceRICOH CO LTD·Filed 2010·Granted Feb 26, 2013·6 cites·13 claims
- 2990US6505347B1Control information generating apparatus for broadcast systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jan 7, 2003·155 cites·35 claims
- 3089US9037008B2Fixing device and image forming apparatus including sameHASE TAKAMASA·Filed 2013·Granted May 19, 2015·4 cites·15 claims
- 3189US8655211B2Fixing device and image forming apparatus incorporating sameFUJIMOTO IPPEI·Filed 2011·Granted Feb 18, 2014·5 cites·16 claims
- 3289US4612885ACamshaft bearing arrangement for overhead cam engineYAMAHA MOTOR CO LTD·Filed 1985·Granted Sep 23, 1986·38 cites·20 claims
- 3388US8406647B2Fixing device including a radiation member to cool a fixing member and a heat conductive memberSHINSHI AKIRA·Filed 2010·Granted Mar 26, 2013·5 cites·8 claims
- 3487US9069304B2Image forming apparatusSESHITA TAKUYA·Filed 2013·Granted Jun 30, 2015·4 cites·18 claims
- 3587US8437675B2Fixing device and image forming apparatus incorporating same having a laminated heater with a flexible heat generation sheetISHII KENJI·Filed 2010·Granted May 7, 2013·5 cites·14 claims
- 3687US5845613AVariable valve timing arrangement for internal combustion engineYAMAHA MOTOR CO LTD·Filed 1997·Granted Dec 8, 1998·51 cites·26 claims
- 3786US8676101B2Fixing device having metal pipe with rough section and image forming apparatus incorporating sameYOSHIKAWA MASAAKI·Filed 2010·Granted Mar 18, 2014·4 cites·7 claims
- 3886US8401448B2Fixing device and image forming apparatus incorporating sameYAMAGUCHI YOSHIKI·Filed 2010·Granted Mar 19, 2013·4 cites·19 claims
- 3986US4660529AFour-cycle engineYAMAHA MOTOR CO LTD·Filed 1982·Granted Apr 28, 1987·34 cites·33 claims
- 4086US4617896AInternal combustion engine having three intake valves per cylinderYAMAHA MOTOR CO LTD·Filed 1985·Granted Oct 21, 1986·34 cites·12 claims
- 4185US9207596B2Image forming apparatus including a fixing deviceRICOH CO LTD·Filed 2014·Granted Dec 8, 2015·2 cites·18 claims
- 4285US8953994B2Fixing device and image forming apparatus incorporating sameIWAYA NAOKI·Filed 2012·Granted Feb 10, 2015·3 cites·8 claims
- 4385US8655246B2Fixing device and image forming apparatus incorporating sameTOKUDA TETSUO·Filed 2011·Granted Feb 18, 2014·4 cites·17 claims
- 4485US5954019AVariable valve timing arrangement for engineYAMAHA MOTOR CO LTD·Filed 1997·Granted Sep 21, 1999·43 cites·12 claims
- 4584US10935911B2Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the sameRICOH CO LTD·Filed 2017·Granted Mar 2, 2021·1 cites·57 claims
- 4684US8855506B2Image forming apparatusHASE TAKAMASA·Filed 2013·Granted Oct 7, 2014·2 cites·8 claims
- 4783US9008558B2Separator and separation device, fixing device, and image forming apparatus incorporating sameSAITO KAZUYA·Filed 2012·Granted Apr 14, 2015·3 cites·20 claims
- 4882US8903296B2Fixing device and image forming apparatus incorporating sameSHIMOKAWA TOSHIHIKO·Filed 2011·Granted Dec 2, 2014·3 cites·8 claims
- 4982US8682218B2Fixing device and image forming apparatus incorporating sameYAMAGUCHI YOSHIKI·Filed 2011·Granted Mar 25, 2014·3 cites·8 claims
- 5082US8655244B2Fixing device and image forming apparatus incorporating sameHASEGAWA KENICHI·Filed 2010·Granted Feb 18, 2014·3 cites·13 claims
Showing the top 50 of 198 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →