Inventor · disambiguated record
Yoshimi Kohayakawa
Also filed as: KOHAYAKAWA YOSHIMI · MATSUMMURA ISAO
60 granted patents·2 pending applications·2,092 citations·filing 1975–2002
99Inventor score
Files withCANON KK61
Top patents by PatentIndex Score
62 records- 0187US4609287AMethod of and apparatus for measuring refractive characteristicsCANON KK·Filed 1983·Granted Sep 2, 1986·38 cites·8 claims
- 0273US4293198AEye refractometerCANON KK·Filed 1978·Granted Oct 6, 1981·62 cites·26 claims
- 0371US4826315ALens meterCANON KK·Filed 1986·Granted May 2, 1989·26 cites·4 claims
- 0471US4372655AAutomatic eye-refractometerCANON KK·Filed 1979·Granted Feb 8, 1983·56 cites·7 claims
- 0570US5657116AOcular lens measuring apparatusCANON KK·Filed 1995·Granted Aug 12, 1997·27 cites·11 claims
- 0669US5231430AOphthalmic apparatusCANON KK·Filed 1991·Granted Jul 27, 1993·132 cites·26 claims
- 0769US4252420AOphthalmoscopical apparatus provided with adjustment systemCANON KK·Filed 1978·Granted Feb 24, 1981·49 cites·10 claims
- 0866US5489978ALens measuring apparatusCANON KK·Filed 1993·Granted Feb 6, 1996·24 cites·20 claims
- 0965US5713047AEye fundus photographing apparatusCANON KK·Filed 1994·Granted Jan 27, 1998·108 cites·22 claims
- 1065US5231460AAutomatic lens meterCANON KK·Filed 1991·Granted Jul 27, 1993·24 cites·11 claims
- 1164US4717952AMedical television systemCANON KK·Filed 1986·Granted Jan 5, 1988·70 cites·9 claims
- 1264US4102563AEye fundus camera free from undesired reflected and diffused light beamsCANON KK·Filed 1976·Granted Jul 25, 1978·41 cites·6 claims
- 1363US4452517AFocusing system for eye-ground cameraCANON KK·Filed 1982·Granted Jun 5, 1984·49 cites·29 claims
- 1461US5995759AStereoscopic image apparatusCANON KK·Filed 1997·Granted Nov 30, 1999·23 cites·7 claims
- 1561US4421391AAuto eye-refractometerCANON KK·Filed 1980·Granted Dec 20, 1983·49 cites·9 claims
- 1661US4376573AApparatus for measuring the refractive power of the eyeCANON KK·Filed 1980·Granted Mar 15, 1983·49 cites·22 claims
- 1760US5889577AOptical apparatus or apparatus for detecting direction of line of sight, and various kinds of same apparatus using the sameCANON KK·Filed 1997·Granted Mar 30, 1999·49 cites·21 claims
- 1857US5523808AOphthalmic apparatus having an intraocular pressure measuring systemCANON KK·Filed 1994·Granted Jun 4, 1996·73 cites·14 claims
- 1956US6685318B2Ophthalmologic apparatusCANON KK·Filed 2002·Granted Feb 3, 2004·10 cites·17 claims
- 2056US5825460AVisual function measuring apparatusCANON KK·Filed 1995·Granted Oct 20, 1998·79 cites·15 claims
- 2156US5090798AApplied intensity distribution controlling apparatusCANON KK·Filed 1991·Granted Feb 25, 1992·70 cites·17 claims
- 2256US4830483ALaser applying apparatusCANON KK·Filed 1988·Granted May 16, 1989·48 cites·15 claims
- 2355US4146310AOphthalmoscopic optical systemCANON KK·Filed 1977·Granted Mar 27, 1979·26 cites·8 claims
- 2454US4257687AEye examining instrument with photo-detecting systemCANON KK·Filed 1978·Granted Mar 24, 1981·25 cites·8 claims
- 2553US4196979AMethod and device for detecting distance between eye-examining instrument and eyeCANON KK·Filed 1977·Granted Apr 8, 1980·23 cites·22 claims
- 2652US4820037AApparatus for measuring the refractive power of an eyeCANON KK·Filed 1988·Granted Apr 11, 1989·38 cites·15 claims
- 2751US6309068B1Eye examining apparatusCANON KK·Filed 1998·Granted Oct 30, 2001·57 cites·12 claims
- 2851US5483305AEye examining apparatusCANON KK·Filed 1994·Granted Jan 9, 1996·52 cites·13 claims
- 2951US4600012AApparatus for detecting abnormality in spinal columnCANON KK·Filed 1985·Granted Jul 15, 1986·41 cites·9 claims
- 3050US6757555B2Ophthalmologic apparatusCANON KK·Filed 2002·Granted Jun 29, 2004·4 cites·9 claims
- 3150US5037194AOphthalmologic apparatus and method of compounding the image of an eye to be examinedCANON KK·Filed 1989·Granted Aug 6, 1991·36 cites·41 claims
- 3249US5675399AOphthalmic apparatusCANON KK·Filed 1995·Granted Oct 7, 1997·50 cites·12 claims
- 3348US4697895AAutomatic optometerCANON KK·Filed 1985·Granted Oct 6, 1987·33 cites·9 claims
- 3446US4412728AFocusing apparatus for eye-fundus examining instrumentCANON KK·Filed 1980·Granted Nov 1, 1983·22 cites·20 claims
- 3545US5325134AKeratometerCANON KK·Filed 1992·Granted Jun 28, 1994·38 cites·11 claims
- 3644US5847805AScan imaging device for forming a stereoscopic image of the eyeCANON KK·Filed 1997·Granted Dec 8, 1998·37 cites·23 claims
- 3744US5237351AVisual target apparatusCANON KK·Filed 1992·Granted Aug 17, 1993·36 cites·22 claims
- 3843US5777718AEye refractometerCANON KK·Filed 1997·Granted Jul 7, 1998·35 cites·14 claims
- 3943US5757463AEye examining apparatus scanning the eye with a light beamCANON KK·Filed 1997·Granted May 26, 1998·35 cites·15 claims
- 4043US4198144AEye fundus cameraCANON KK·Filed 1978·Granted Apr 15, 1980·13 cites·8 claims
- 4143US2002180930A1Ophthalmologic apparatusCANON KK·Filed 2002·Application pending·0 cites
- 4242US4634241AStereoscopic microscopeCANON KK·Filed 1985·Granted Jan 6, 1987·20 cites·7 claims
- 4342US2001024264A1Ophthalmologic apparatusFiled 2001·Application pending·0 cites
- 4441US5280313AOphthalmic measuring apparatusCANON KK·Filed 1992·Granted Jan 18, 1994·27 cites·7 claims
- 4541US5031623ANon-contact tonometerCANON KK·Filed 1989·Granted Jul 16, 1991·19 cites·7 claims
- 4640US5557321AFundus camera or opthalmic apparatus comprising a flash light source systemCANON KK·Filed 1995·Granted Sep 17, 1996·28 cites·11 claims
- 4740US5523809AEye refraction measuring apparatus including optical path separating member light beam separating member, and/or light diameter changing meansCANON KK·Filed 1993·Granted Jun 4, 1996·26 cites·14 claims
- 4840US4825873ANon-contact eye pressure meterCANON KK·Filed 1987·Granted May 2, 1989·18 cites·11 claims
- 4939US4704012AStereoscopic microscopeCANON KK·Filed 1985·Granted Nov 3, 1987·17 cites·9 claims
- 5038US6304723B1Retinal cameraCANON KK·Filed 1997·Granted Oct 16, 2001·23 cites·7 claims
Showing the top 50 of 62 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →