Inventor · disambiguated record
Ryuji Tokuda
Also filed as: KUMAZAWA KENICHI · TOKUDA RYUJI
26 granted patents·299 citations·filing 1978–2001
96Inventor score
Files withCANON KK26
Top patents by PatentIndex Score
26 records- 0193US4350418ACamera provided with automatic focus adjusting deviceCANON KK·Filed 1979·Granted Sep 21, 1982·75 cites·66 claims
- 0276US6858983B2Display device having conical transparent members covering electroluminescent elementsCANON KK·Filed 2001·Granted Feb 22, 2005·22 cites·21 claims
- 0376US4542970AShutter release deviceCANON KK·Filed 1984·Granted Sep 24, 1985·12 cites·12 claims
- 0476US4502774ABattery check device for cameraCANON KK·Filed 1983·Granted Mar 5, 1985·12 cites·9 claims
- 0574US4550992AMotor drive control circuitCANON KK·Filed 1984·Granted Nov 5, 1985·11 cites·7 claims
- 0673US4453812AAuto-focus device for cameraCANON KK·Filed 1982·Granted Jun 12, 1984·10 cites·10 claims
- 0772US4547770ABattery voltage checking apparatusCANON KK·Filed 1983·Granted Oct 15, 1985·23 cites·7 claims
- 0870US4544254ACamera with a display device for displaying both object distance informations and coupling range informationsCANON KK·Filed 1983·Granted Oct 1, 1985·9 cites·20 claims
- 0964US4429967ADistance measuring systemCANON KK·Filed 1982·Granted Feb 7, 1984·18 cites·7 claims
- 1064US4206987AExposure adjusting device for camera systemCANON KK·Filed 1978·Granted Jun 10, 1980·6 cites·8 claims
- 1163US4720723ADistance measuring deviceCANON KK·Filed 1986·Granted Jan 19, 1988·23 cites·25 claims
- 1262US4512643AExposure control device for cameraCANON KK·Filed 1984·Granted Apr 23, 1985·7 cites·9 claims
- 1359US4701048AInput circuit for distance measuring apparatusCANON KK·Filed 1984·Granted Oct 20, 1987·14 cites·32 claims
- 1454US4425031AAutomatic focus adjusting apparatus for cameraCANON KK·Filed 1981·Granted Jan 10, 1984·13 cites·31 claims
- 1554US4300824ASignal processing circuitry for a distance measuring systemCANON KK·Filed 1979·Granted Nov 17, 1981·11 cites·21 claims
- 1647US4482236AElectrically operated camera and disabling device thereforCANON KK·Filed 1982·Granted Nov 13, 1984·4 cites·11 claims
- 1747US4415249AMotor drive circuit for cameraCANON KK·Filed 1982·Granted Nov 15, 1983·4 cites·6 claims
- 1842US4479708ATemperature compensation system of light measuring circuitCANON KK·Filed 1982·Granted Oct 30, 1984·8 cites·4 claims
- 1938US4482238ABrightness warning device for cameraCANON KK·Filed 1981·Granted Nov 13, 1984·2 cites·5 claims
- 2038US4459574ADriving circuit for a coilCANON KK·Filed 1982·Granted Jul 10, 1984·5 cites·5 claims
- 2136US4537489AAutomatic focusing deviceCANON KK·Filed 1984·Granted Aug 27, 1985·1 cites·6 claims
- 2235US4500193AIndicating apparatus for cameraCANON KK·Filed 1983·Granted Feb 19, 1985·1 cites·10 claims
- 2335US4365878ASignal processing circuitry for a distance measuring systemCANON KK·Filed 1981·Granted Dec 28, 1982·4 cites·9 claims
- 2434US4375321AExposure amount control deviceCANON KK·Filed 1981·Granted Mar 1, 1983·1 cites·11 claims
- 2533US4317070ACircuits for flash equipmentCANON KK·Filed 1981·Granted Feb 23, 1982·3 cites·11 claims
- 2630US4425032ACameras and circuits for sensing the action of camera shuttersCANON KK·Filed 1981·Granted Jan 10, 1984·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →