Inventor · disambiguated record
Kazumasa Ishikawa
Also filed as: ISHIKAWA KAZUMASA
13 granted patents·3 pending applications·153 citations·filing 1979–2021
91Inventor score
Top patents by PatentIndex Score
16 records- 0189US5546370ACompact apparatus having bidirectional motion for loading/unloading an information recording mediumOLYMPUS OPTICAL CO·Filed 1994·Granted Aug 13, 1996·54 cites·8 claims
- 0288US5884860ARolled paper feeding apparatus which provides a constant torque for uncurling paper and a torque limiting device thereforRICOH KK·Filed 1996·Granted Mar 23, 1999·40 cites·14 claims
- 0382US7505714B2Image forming deviceRICOH KK·Filed 2005·Granted Mar 17, 2009·8 cites·10 claims
- 0480US7393080B2Image forming apparatusRICOH KK·Filed 2005·Granted Jul 1, 2008·6 cites·10 claims
- 0566US7712892B2Image forming apparatusRICOH KK·Filed 2005·Granted May 11, 2010·2 cites·7 claims
- 0665US4695898AFacsimile machine using cut sheets of paperRICOH KK·Filed 1986·Granted Sep 22, 1987·20 cites·13 claims
- 0757US7431422B2Head cleaner and image forming apparatusRICOH KK·Filed 2004·Granted Oct 7, 2008·6 cites·25 claims
- 0848US2024375230A1Fly-cut apparatusTOKYO SEIMITSU CO LTD·Filed 2021·Application pending·0 cites
- 0944US4336501AFrequency characteristic adjusting circuitNIPPON COLUMBIA·Filed 1979·Granted Jun 22, 1982·9 cites·17 claims
- 1044US2010149299A1Image forming apparatusNISHIDA HAJIME·Filed 2010·Application pending·0 cites
- 1143US7367667B2Image forming apparatus with conveying part arranged to allow dryingRICOH KK·Filed 2004·Granted May 6, 2008·2 cites·25 claims
- 1242US9067265B2Cutting methodNORIHISA TAKASHI·Filed 2011·Granted Jun 30, 2015·0 cites·2 claims
- 1339US5475671AOptical information detection circuit and detecting photoelectrically converted signal from light receiving means comprising at least two light receiving elementsOLYMPUS OPTICAL CO·Filed 1994·Granted Dec 12, 1995·4 cites·9 claims
- 1438US2007115319A1Image forming apparatus, maintenance-recovery mechanism, and suction pumpISHIKAWA KAZUMASA·Filed 2006·Application pending·0 cites
- 1534USD375118SCleaning toner magazineRICOH CO LTD·Filed 1995·Granted Oct 29, 1996·2 cites·1 claims
- 1629US4621209AFrequency-independent phase compensation circuitOLYMPUS OPTICAL CO·Filed 1984·Granted Nov 4, 1986·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →