Inventor · disambiguated record
Kazuhiro Wakamatsu
Also filed as: WAKAMATSU KAZUHIRO
40 granted patents·2 pending applications·495 citations·filing 1983–2016
98Inventor score
Top patents by PatentIndex Score
42 records- 0198US6381428B1Photoconductor unit and image forming systemHITACHI LTD·Filed 2000·Granted Apr 30, 2002·82 cites·13 claims
- 0296US6697586B2Photoconductor unit and image forming systemHITACHI LTD·Filed 2002·Granted Feb 24, 2004·50 cites·3 claims
- 0395US7298981B2Fixing device and image forming apparatus with guide having adjustable biasing angleRICOH PRINTING SYS LTD·Filed 2005·Granted Nov 20, 2007·23 cites·11 claims
- 0494US6501925B2Photoconductor unit and image forming systemHITACHI LTD·Filed 2002·Granted Dec 31, 2002·41 cites·2 claims
- 0593US8131197B2Fixing device and electro photographic apparatus using the sameHIRAOKA CHIKARA·Filed 2008·Granted Mar 6, 2012·21 cites·20 claims
- 0692US8764182B2Image forming apparatus including sheet cutting deviceOGAWA MASATO·Filed 2011·Granted Jul 1, 2014·11 cites·13 claims
- 0792US8118296B2Open/close mechanism for paper tray for use in image forming apparatusNISHII TOSHIKANE·Filed 2010·Granted Feb 21, 2012·6 cites·7 claims
- 0891US7731170B2Open/close mechanism for paper tray for use in image forming apparatusRICOH KK·Filed 2007·Granted Jun 8, 2010·10 cites·8 claims
- 0989US6327447B1Electrophotographic apparatus having heat exhaustion deviceHITACHI LTD·Filed 2000·Granted Dec 4, 2001·34 cites·9 claims
- 1085US7758040B2Sheet feed cassette and image forming apparatus using the sameRICOH KK·Filed 2007·Granted Jul 20, 2010·10 cites·17 claims
- 1184US8073375B2Fixing unit and image forming apparatus having the sameHIRAOKA CHIKARA·Filed 2008·Granted Dec 6, 2011·8 cites·8 claims
- 1281US8657402B2Image forming apparatus including sheet cutting deviceMAEYAMA YUICHIRO·Filed 2011·Granted Feb 25, 2014·3 cites·5 claims
- 1381US5113226AImage transfer apparatusHITACHI LTD·Filed 1990·Granted May 12, 1992·27 cites·4 claims
- 1477US7142794B2Image forming apparatusRICOH PRINTING SYS LTD·Filed 2005·Granted Nov 28, 2006·5 cites·16 claims
- 1575US6253039B1Color image forming apparatusHITACHI LTD·Filed 1999·Granted Jun 26, 2001·23 cites·4 claims
- 1674US9238566B2Sheet cutting device and image forming apparatus including the sheet cutting deviceOGAWA MASATO·Filed 2012·Granted Jan 19, 2016·4 cites·11 claims
- 1774US9004390B2Roll medium holding unit, roll sheet feeder, and image forming apparatusMORINAGA SHIGERU·Filed 2011·Granted Apr 14, 2015·4 cites·5 claims
- 1873US6308025B1Electrophotography apparatusHITACHI LTD·Filed 2000·Granted Oct 23, 2001·14 cites·10 claims
- 1971US5291254AElectrophotographic recording apparatusHITACHI LTD·Filed 1992·Granted Mar 1, 1994·19 cites·10 claims
- 2065US8955962B2Image forming apparatus including sheet cutting deviceMAEYAMA YUICHIRO·Filed 2012·Granted Feb 17, 2015·2 cites·15 claims
- 2165US6081683AColor electrophotographic apparatus with obliquely arranged photosensitive beltHITACHI LTD·Filed 1996·Granted Jun 27, 2000·17 cites·12 claims
- 2262US5621504AToner transferring deviceHITACHI LTD·Filed 1994·Granted Apr 15, 1997·13 cites·7 claims
- 2361USD437348SPrinterHITACHI LTD·Filed 1999·Granted Feb 6, 2001·11 cites·1 claims
- 2459US8925436B2Sheet cutting device and image forming apparatus including the sheet cutting deviceYOSHINUMA TOSHIHIRO·Filed 2012·Granted Jan 6, 2015·1 cites·8 claims
- 2559US6661994B2Electrophotographic image forming systemHITACHI LTD·Filed 2002·Granted Dec 9, 2003·6 cites·5 claims
- 2658US8561979B2Open/close mechanism for paper tray for use in image forming apparatusNISHII TOSHIKANE·Filed 2012·Granted Oct 22, 2013·0 cites·12 claims
- 2756US4552449ACompound image recording apparatusHITACHI LTD·Filed 1983·Granted Nov 12, 1985·14 cites·11 claims
- 2853US8967028B2Sheet cutting device and image forming apparatus including the sheet cutting deviceYAMADA MASAHIKO·Filed 2012·Granted Mar 3, 2015·0 cites·17 claims
- 2953US7292805B2Image forming apparatus having a sheet removal portionRICOH PRINTING SYS LTD·Filed 2004·Granted Nov 6, 2007·5 cites·18 claims
- 3053US6760564B2Picture image forming apparatus with intermediate transfer belt trained around two rollers of different diameterHITACHI LTD·Filed 2002·Granted Jul 6, 2004·5 cites·12 claims
- 3152US5373354AColor electrophotographic device and methodHITACHI LTD·Filed 1992·Granted Dec 13, 1994·9 cites·7 claims
- 3246US7428394B2Electronic color photography apparatusRICOH PRINTING SYS LTD·Filed 2005·Granted Sep 23, 2008·0 cites·20 claims
- 3343USD452703SPrinterHITACHI LTD·Filed 2000·Granted Jan 1, 2002·5 cites·1 claims
- 3443US4922272AHigh precision image recording apparatusHITACHI LTD·Filed 1989·Granted May 1, 1990·7 cites·30 claims
- 3542US8967790B2Sheet cutting device and image forming apparatus including the sheet cutting deviceYAMADA MASAHIKO·Filed 2011·Granted Mar 3, 2015·0 cites·13 claims
- 3642US6694117B2Color photographic apparatusHITACHI LTD·Filed 2002·Granted Feb 17, 2004·3 cites·7 claims
- 3741US8593651B2Image forming apparatus with shortened conveyance path of sheet rollNIIHARA TAKAYUKI·Filed 2011·Granted Nov 26, 2013·0 cites·20 claims
- 3840US10801776B2Drying device and recording medium drying systemRICOH CO LTD·Filed 2016·Granted Oct 13, 2020·0 cites·14 claims
- 3938US2011229242A1Rolled paper driving apparatus and image forming apparatusRICOH CO LTD·Filed 2011·Application pending·0 cites
- 4034US2002025201A1Electrophotographic image forming systemFiled 2001·Application pending·0 cites
- 4130US6181889B1Image forming apparatus with reduced latent image vibration caused by photosensitive belt jointHITACHI LTD·Filed 1997·Granted Jan 30, 2001·2 cites·12 claims
- 4226US6876831B2Image forming apparatus for conducting speed compensation by internal transcription belt cycle measurementHITACHI PRINITNG SOLUTIONS INC·Filed 2003·Granted Apr 5, 2005·0 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →