Inventor · disambiguated record
Masashi Hirai
Also filed as: HIRAI MASASHI
37 granted patents·4 pending applications·443 citations·filing 1988–2016
97Inventor score
Top patents by PatentIndex Score
41 records- 0192US6148168AApparatus for forming superimposed image patterns having controlled densitiesSHARP KK·Filed 1999·Granted Nov 14, 2000·56 cites·9 claims
- 0291US7162192B2Transfer belt device and image forming apparatusSHARP KK·Filed 2005·Granted Jan 9, 2007·13 cites·18 claims
- 0389US6173141B1Apparatus for forming color images by the superimposition of visualized latent images having drive means for simultaneously driving at least a recording medium conveying means and a source of black visualized latent imagesSHARP KK·Filed 1998·Granted Jan 9, 2001·54 cites·11 claims
- 0486US6775486B2Image forming apparatusSHARP KK·Filed 2003·Granted Aug 10, 2004·23 cites·7 claims
- 0586US6108514ASheet conveying systemSHARP KK·Filed 1999·Granted Aug 22, 2000·39 cites·10 claims
- 0685US7257351B2Detaching/attaching mechanism and image forming deviceSHARP KK·Filed 2003·Granted Aug 14, 2007·25 cites·20 claims
- 0784US6014920APaper-punching device for use in a image-forming apparatusSHARP KK·Filed 1998·Granted Jan 18, 2000·36 cites·12 claims
- 0880US7917071B2Transfer belt unit and image forming apparatus using the sameSHARP KK·Filed 2008·Granted Mar 29, 2011·6 cites·9 claims
- 0980US7085504B2Image forming apparatusSHARP KK·Filed 2004·Granted Aug 1, 2006·16 cites·7 claims
- 1079US6301023B1Image forming apparatusSHARP KK·Filed 1999·Granted Oct 9, 2001·28 cites·16 claims
- 1179US5651542APaper feederSHARP KK·Filed 1995·Granted Jul 29, 1997·26 cites·7 claims
- 1273US8824916B2Belt conveyor member and image forming apparatusHIRAI MASASHI·Filed 2012·Granted Sep 2, 2014·2 cites·5 claims
- 1373US6889027B2Multicolored image forming apparatus for forming multicolored and monochromatic imagesSHARP KK·Filed 2003·Granted May 3, 2005·13 cites·20 claims
- 1472US10451778B2Diffuser plate and method for producing diffuser plateKURARAY CO·Filed 2015·Granted Oct 22, 2019·2 cites·8 claims
- 1572US7548709B2Transfer unit, transfer method, and image forming apparatusSHARP KK·Filed 2006·Granted Jun 16, 2009·4 cites·16 claims
- 1670US5839336APaper-punching device for use in an image-forming apparatusSHARP KK·Filed 1996·Granted Nov 24, 1998·27 cites·18 claims
- 1763US4847652AImage transfer deviceSHARP KK·Filed 1988·Granted Jul 11, 1989·14 cites·4 claims
- 1862US9128420B2Belt unit and image forming apparatusSHARP KK·Filed 2014·Granted Sep 8, 2015·0 cites·13 claims
- 1962US8295726B2Fixing device, image forming apparatus, and method for controlling fixing deviceKAGAWA TOSHIAKI·Filed 2009·Granted Oct 23, 2012·2 cites·13 claims
- 2061US7139498B2Image forming apparatus having transfer bias voltageSHARP KK·Filed 2004·Granted Nov 21, 2006·8 cites·3 claims
- 2160US6876820B2Image forming apparatusSHARP KK·Filed 2004·Granted Apr 5, 2005·7 cites·16 claims
- 2260US5339144ARecording paper separating device with constant current controlSHARP KK·Filed 1991·Granted Aug 16, 1994·13 cites·9 claims
- 2359US8881891B2Belt unit and image forming apparatusSHARP KK·Filed 2012·Granted Nov 11, 2014·0 cites·4 claims
- 2458US7801464B2Ion generating device with a discharge electrode on a dielectric body coated by a protective layer made of metalSHARP KK·Filed 2008·Granted Sep 21, 2010·1 cites·1 claims
- 2557US6411792B2Image forming deviceSHARP KK·Filed 2001·Granted Jun 25, 2002·6 cites·7 claims
- 2654US7162178B2Transfer device and image forming apparatusSHARP KK·Filed 2004·Granted Jan 9, 2007·5 cites·11 claims
- 2751US5884133AElectrostatic image transfer apparatusSHARP KK·Filed 1996·Granted Mar 16, 1999·10 cites·5 claims
- 2847US7725052B2Ion generating device and image forming apparatus including sameSHARP KK·Filed 2008·Granted May 25, 2010·0 cites·26 claims
- 2947US6957022B2Image forming apparatusSHARP KK·Filed 2004·Granted Oct 18, 2005·3 cites·26 claims
- 3045US10126549B2Method for designing light diffusion patter, method for manufacturing light diffusion plate, and light diffusion plateKURARAY CO·Filed 2015·Granted Nov 13, 2018·0 cites·9 claims
- 3143US9091967B2Image forming apparatusSHARP KK·Filed 2013·Granted Jul 28, 2015·0 cites·6 claims
- 3240US7251445B2Image formation device and image forming method using sameSHARP KK·Filed 2005·Granted Jul 31, 2007·0 cites·18 claims
- 3338US8699902B2Image forming apparatus of intermediate transfer method, including pre-secondary-transfer charging section and concentration detection sectionHIRAI MASASHI·Filed 2011·Granted Apr 15, 2014·0 cites·5 claims
- 3438US7919908B2Piezoelectric resonator deviceDAISHINKU CORP·Filed 2007·Granted Apr 5, 2011·0 cites·20 claims
- 3537US8355659B2Fixing device and image forming apparatus having sameSHARP KK·Filed 2010·Granted Jan 15, 2013·0 cites·4 claims
- 3637US5655173AImage forming apparatusSHARP KK·Filed 1996·Granted Aug 5, 1997·4 cites·16 claims
- 3737US2006008721A1Color image forming developer and color image forming apparatusSHARP KK·Filed 2005·Application pending·0 cites
- 3835US2018309044A1Piezoelectric resonator deviceDAISHINKU CORP·Filed 2015·Application pending·0 cites
- 3935US2010183346A1Fixing device and image forming apparatus having sameKAGAWA TOSHIAKI·Filed 2010·Application pending·0 cites
- 4033US2004062577A1Image forming apparatus and transfer unitFiled 2003·Application pending·0 cites
- 4129US10044339B2Piezoelectric deviceDAISHINKU CORP·Filed 2016·Granted Aug 7, 2018·0 cites·7 claims
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