Inventor · disambiguated record
Shigeo Ohtaka
Also filed as: OHTAKA SHIGEO
4 granted patents·118 citations·filing 1982–1993
80Inventor score
Files withHITACHI LTD4
Top patents by PatentIndex Score
4 records- 0182US4492974ADMOS With gate protection diode formed over base regionHITACHI LTD·Filed 1982·Granted Jan 8, 1985·36 cites·15 claims
- 0268US4814288AMethod of fabricating semiconductor devices which include vertical elements and control elementsHITACHI LTD·Filed 1987·Granted Mar 21, 1989·27 cites·26 claims
- 0363US5638246ASemiconductor device having a protection circuit, and electronic system including the sameHITACHI LTD·Filed 1993·Granted Jun 10, 1997·25 cites·41 claims
- 0462US5196354AMethod of manufacturing semiconductor device with controlled carrier lifetimeHITACHI LTD·Filed 1990·Granted Mar 23, 1993·30 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →