Inventor · disambiguated record
Ikuya Tsurukawa
Also filed as: TSURUKAWA IKUYA
18 granted patents·1 pending application·341 citations·filing 1983–2007
95Inventor score
Files withRICOH KK19
Top patents by PatentIndex Score
19 records- 0189US7744294B2Lens barrel, camera, portable information terminal device, and image input deviceRICOH KK·Filed 2007·Granted Jun 29, 2010·13 cites·8 claims
- 0286US6617816B2DC motor rotation detecting apparatus and DC motor rotation control apparatusRICOH KK·Filed 2000·Granted Sep 9, 2003·34 cites·24 claims
- 0385US6628893B2DC motor rotation control apparatusRICOH KK·Filed 2001·Granted Sep 30, 2003·36 cites·34 claims
- 0484US4847648AVarifocal cameraRICOH KK·Filed 1988·Granted Jul 11, 1989·25 cites·2 claims
- 0583US7259923B2Lens barrelRICOH KK·Filed 2004·Granted Aug 21, 2007·25 cites·6 claims
- 0672US4831399AFinder switching apparatus for cameraRICOH KK·Filed 1987·Granted May 16, 1989·14 cites·5 claims
- 0772US4498754ASingle lens reflex cameraRICOH KK·Filed 1983·Granted Feb 12, 1985·9 cites·5 claims
- 0867US6570350B2DC motor rotation detecting apparatus and DC motor rotation control apparatusRICOH KK·Filed 2001·Granted May 27, 2003·15 cites·4 claims
- 0967US5392159AZoom lens device of two-lens group structure and driving device of varifocal lens of two-lens group structureRICOH KK·Filed 1992·Granted Feb 21, 1995·35 cites·4 claims
- 1065US5293034AFocus state detection deviceRICOH KK·Filed 1991·Granted Mar 8, 1994·28 cites·8 claims
- 1162US7048574B2Resilient contact structure with bypass wire and camera having such contactRICOH KK·Filed 2004·Granted May 23, 2006·7 cites·20 claims
- 1260US4985719AApparatus for preventing static electricity of plastic lensRICOH KK·Filed 1990·Granted Jan 15, 1991·23 cites·10 claims
- 1358US4605295ASingle lens reflex cameraRICOH KK·Filed 1984·Granted Aug 12, 1986·5 cites·5 claims
- 1457US5267085AZoom lens apparatus of two-lens group structureRICOH KK·Filed 1992·Granted Nov 30, 1993·21 cites·2 claims
- 1557US4950061ADrive device for a varifocal lens systemRICOH KK·Filed 1988·Granted Aug 21, 1990·19 cites·24 claims
- 1656US4561747AAuto-focusing methodRICOH KK·Filed 1984·Granted Dec 31, 1985·14 cites·5 claims
- 1752US7307368B2DC motorRICOH KK·Filed 2001·Granted Dec 11, 2007·6 cites·10 claims
- 1844US5146254AApparatus for driving varifocal lensRICOH KK·Filed 1991·Granted Sep 8, 1992·12 cites·3 claims
- 1937US2002163259A1DC motorRICOH KK·Filed 2000·Application pending·0 cites
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