Inventor · disambiguated record
Shigehiko Yamamoto
Also filed as: YAMAMOTO SHIGEHIKO
14 granted patents·227 citations·filing 1974–1988
93Inventor score
Files withHITACHI LTD14
Top patents by PatentIndex Score
14 records- 0190US4379250AField emission cathode and method of fabricating the sameHITACHI LTD·Filed 1980·Granted Apr 5, 1983·39 cites·18 claims
- 0288US4518890AImpregnated cathodeHITACHI LTD·Filed 1983·Granted May 21, 1985·30 cites·16 claims
- 0383US4193013ACathode for an electron source and a method of producing the sameHITACHI LTD·Filed 1978·Granted Mar 11, 1980·19 cites·14 claims
- 0481US4783613AImpregnated cathodeHITACHI LTD·Filed 1987·Granted Nov 8, 1988·26 cites·15 claims
- 0576US3945698AMethod of stabilizing emitted electron beam in field emission electron gunHITACHI LTD·Filed 1974·Granted Mar 23, 1976·14 cites·10 claims
- 0672US4855637AOxidation resistant impregnated cathodeHITACHI LTD·Filed 1988·Granted Aug 8, 1989·17 cites·9 claims
- 0772US4310777ADirectly heated cathode for electron tubeHITACHI LTD·Filed 1980·Granted Jan 12, 1982·14 cites·7 claims
- 0867US3932314AHexaboride electron emissive materialHITACHI LTD·Filed 1974·Granted Jan 13, 1976·11 cites·6 claims
- 0963US4291252AElectron tube cathodeHITACHI LTD·Filed 1979·Granted Sep 22, 1981·9 cites·8 claims
- 1061US4737679AImpregnated cathodeHITACHI LTD·Filed 1986·Granted Apr 12, 1988·11 cites·17 claims
- 1155US4626470AImpregnated cathodeHITACHI LTD·Filed 1985·Granted Dec 2, 1986·14 cites·11 claims
- 1249US4687930AIon beam apparatusHITACHI LTD·Filed 1985·Granted Aug 18, 1987·7 cites·6 claims
- 1347US4260665AElectron tube cathode and method for producing the sameHITACHI LTD·Filed 1978·Granted Apr 7, 1981·8 cites·11 claims
- 1440US4639377AThin film formation technique and equipmentHITACHI LTD·Filed 1985·Granted Jan 27, 1987·8 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →