Inventor · disambiguated record
Isao Matsumura
Also filed as: KOHAYAKAWA YOSHIMI · MATSUMURA ISAO
44 granted patents·2 pending applications·1,251 citations·filing 1968–2018
99Inventor score
Top patents by PatentIndex Score
46 records- 0198US4265518AVariable magnification apparatus having illumination compensating abilityCANON KK·Filed 1978·Granted May 5, 1981·55 cites·34 claims
- 0290US4044373AIGFET with gate protection diode and antiparasitic isolation meansHITACHI LTD·Filed 1973·Granted Aug 23, 1977·51 cites·7 claims
- 0386US6801913B2Medical instrument control systemCANON KK·Filed 2001·Granted Oct 5, 2004·33 cites·43 claims
- 0484US3934159ASemiconductor circuit devices using insulated gate-type field effect elements having protective diodesHITACHI LTD·Filed 1968·Granted Jan 20, 1976·30 cites·20 claims
- 0580US4674845AStereoscopic microscope with means for varying stereoscopic viewing angleCANON KK·Filed 1985·Granted Jun 23, 1987·39 cites·12 claims
- 0672US4205347ATelevision signal determination in an automatic tuning systemSHARP KK·Filed 1978·Granted May 27, 1980·9 cites·13 claims
- 0771US4372655AAutomatic eye-refractometerCANON KK·Filed 1979·Granted Feb 8, 1983·56 cites·7 claims
- 0871US4236182AAutomatic pre-programming system for TV receiversSHARP KK·Filed 1978·Granted Nov 25, 1980·9 cites·12 claims
- 0970US4279478AEye examining instrumentCANON KK·Filed 1978·Granted Jul 21, 1981·50 cites·30 claims
- 1069US4257688AEye examining instrumentCANON KK·Filed 1978·Granted Mar 24, 1981·48 cites·20 claims
- 1168US4253743AEye testing instrumentCANON KK·Filed 1978·Granted Mar 3, 1981·47 cites·8 claims
- 1265US2004249729A1Medical instrument control systemCANON KK·Filed 2004·Application pending·0 cites
- 1364US4657356AStereoscopic microscope with a pair of image rotation correcting meansCANON KK·Filed 1985·Granted Apr 14, 1987·23 cites·8 claims
- 1464US4283124AEye fundus cameraCANON KK·Filed 1978·Granted Aug 11, 1981·39 cites·30 claims
- 1564US4102563AEye fundus camera free from undesired reflected and diffused light beamsCANON KK·Filed 1976·Granted Jul 25, 1978·41 cites·6 claims
- 1661US4421391AAuto eye-refractometerCANON KK·Filed 1980·Granted Dec 20, 1983·49 cites·9 claims
- 1761US4376573AApparatus for measuring the refractive power of the eyeCANON KK·Filed 1980·Granted Mar 15, 1983·49 cites·22 claims
- 1860US4787734AStereoscopic microscopeCANON KK·Filed 1986·Granted Nov 29, 1988·19 cites·12 claims
- 1956US4690525AEye fundus cameraCANON KK·Filed 1984·Granted Sep 1, 1987·37 cites·6 claims
- 2056US4251139AEye examining instrumentCANON KK·Filed 1978·Granted Feb 17, 1981·28 cites·9 claims
- 2156US4068932AOptical instrument for examining the eye fundusCANON KK·Filed 1976·Granted Jan 17, 1978·29 cites·18 claims
- 2255US5116114AOphthalmologic apparatusCANON KK·Filed 1991·Granted May 26, 1992·74 cites·15 claims
- 2355US4318585AOptical system with an afocal focusing groupCANON KK·Filed 1979·Granted Mar 9, 1982·24 cites·13 claims
- 2455US4146310AOphthalmoscopic optical systemCANON KK·Filed 1977·Granted Mar 27, 1979·26 cites·8 claims
- 2554US2012018483A1Roll Paper HolderMATSUMURA ISAO·Filed 2011·Application pending·0 cites
- 2653US4196979AMethod and device for detecting distance between eye-examining instrument and eyeCANON KK·Filed 1977·Granted Apr 8, 1980·23 cites·22 claims
- 2751US3936844AEye-fundus camera easy for alignment of pupilCANON KK·Filed 1974·Granted Feb 3, 1976·24 cites·7 claims
- 2850US5037194AOphthalmologic apparatus and method of compounding the image of an eye to be examinedCANON KK·Filed 1989·Granted Aug 6, 1991·36 cites·41 claims
- 2950US4678297AOphthalmic instrumentCANON KK·Filed 1986·Granted Jul 7, 1987·36 cites·10 claims
- 3050US4132466AOphthalmoscopic optical systemCANON KK·Filed 1976·Granted Jan 2, 1979·20 cites·8 claims
- 3148US6702441B2Ophthalmic measuring deviceCANON KK·Filed 2002·Granted Mar 9, 2004·1 cites·8 claims
- 3248US4572627AEye fundus cameraCANON KK·Filed 1982·Granted Feb 25, 1986·24 cites·15 claims
- 3347US4917458ACornea shape measuring apparatusCANON KK·Filed 1989·Granted Apr 17, 1990·29 cites·13 claims
- 3445US5056522ASupersonic ophthalmic measuring apparatusCANON KK·Filed 1990·Granted Oct 15, 1991·40 cites·13 claims
- 3545US4991584AOphthalmic examining apparatus and method capable of examining glaucomaCANON KK·Filed 1989·Granted Feb 12, 1991·27 cites·23 claims
- 3644US11993041B2Tire vulcanizing bladder and pneumatic tireBRIDGESTONE CORP·Filed 2018·Granted May 28, 2024·0 cites·1 claims
- 3743US4198144AEye fundus cameraCANON KK·Filed 1978·Granted Apr 15, 1980·13 cites·8 claims
- 3840US4867554ASurface examining apparatusCANON KK·Filed 1988·Granted Sep 19, 1989·18 cites·14 claims
- 3938US5018851ASlit illuminating apparatusCANON KK·Filed 1989·Granted May 28, 1991·15 cites·15 claims
- 4037US5066117APerimeterCANON KK·Filed 1990·Granted Nov 19, 1991·19 cites·31 claims
- 4137US4762410AOphthalmic instrumentCANON KK·Filed 1987·Granted Aug 9, 1988·16 cites·8 claims
- 4235US4813778AOphthalmic positioning apparatusCANON KK·Filed 1986·Granted Mar 21, 1989·13 cites·1 claims
- 4334US4699481AStereoscopic microscopeCANON KK·Filed 1985·Granted Oct 13, 1987·10 cites·11 claims
- 4433US4999009ADevice for use with a cornea shape measuring apparatusCANON KK·Filed 1989·Granted Mar 12, 1991·8 cites·20 claims
- 4533US4620779AOphthalmologic apparatusCANON KK·Filed 1985·Granted Nov 4, 1986·8 cites·5 claims
- 4633US4098549AEye bottom cameraCANON KK·Filed 1976·Granted Jul 4, 1978·6 cites·3 claims
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