Inventor · disambiguated record
Tatsuhiko Oikawa
Also filed as: OIKAWA TATSUHIKO
13 granted patents·1 pending application·136 citations·filing 1989–2009
91Inventor score
Top patents by PatentIndex Score
14 records- 0194US7971878B2Sheet conveying device and image forming apparatusRICOH CO LTD·Filed 2009·Granted Jul 5, 2011·19 cites·10 claims
- 0288US6923520B2Head driving unit and an image forming apparatus using the sameRICOH KK·Filed 2002·Granted Aug 2, 2005·36 cites·5 claims
- 0387US8165498B2Image forming deviceHOSHINO SEIJI·Filed 2008·Granted Apr 24, 2012·11 cites·11 claims
- 0483US8126387B2Sheet conveying device and image forming apparatusNOGUCHI HIDETAKA·Filed 2008·Granted Feb 28, 2012·7 cites·15 claims
- 0583US5029840AAutomatic sheet feeder for an image recording apparatusRICOH KK·Filed 1989·Granted Jul 9, 1991·27 cites·7 claims
- 0678US8422037B2Image forming apparatusHODOSHIMA TAKASHI·Filed 2009·Granted Apr 16, 2013·7 cites·14 claims
- 0778US8087670B2Sheet conveying device and image forming apparatusNOGUCHI HIDETAKA·Filed 2009·Granted Jan 3, 2012·6 cites·13 claims
- 0877US8254811B2Image forming apparatus for controlling movement of a moving memberANDOH TOSHIYUKI·Filed 2009·Granted Aug 28, 2012·5 cites·13 claims
- 0975US8364071B2Image forming apparatus and sheet conveying device having upstream and downstream rollersRICOH CO LTD·Filed 2008·Granted Jan 29, 2013·5 cites·20 claims
- 1070US7945176B2Image forming apparatus including a gap forming unitRICOH CO LTD·Filed 2007·Granted May 17, 2011·3 cites·20 claims
- 1169US8538310B2Image transfer apparatus, image fixing apparatus, and registration apparatus which prevent a load torque variation upon entry or exit of a sheet into a nipping portionMATSUDA HIROMICHI·Filed 2008·Granted Sep 17, 2013·3 cites·18 claims
- 1262US8131173B2Driving apparatus and image forming apparatusNOGUCHI HIDETAKA·Filed 2008·Granted Mar 6, 2012·2 cites·14 claims
- 1341US2008175612A1Motor control device and image forming apparatusRICOH KK·Filed 2008·Application pending·0 cites
- 1435US6147766APrinting apparatus for increasing efficiency in transmitting image data between internal control unitsRICOH KK·Filed 1998·Granted Nov 14, 2000·5 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →