Inventor · disambiguated record
Hendrik C. De Graaff
Also filed as: DE GRAAFF HENDRIK C
3 granted patents·59 citations·filing 1977–1986
73Inventor score
Files withPHILIPS CORP3
Top patents by PatentIndex Score
3 records- 0159US4151006AMethod of manufacturing a semiconductor devicePHILIPS CORP·Filed 1977·Granted Apr 24, 1979·18 cites·13 claims
- 0257US4409606AHigh breakdown voltage semiconductor devicePHILIPS CORP·Filed 1981·Granted Oct 11, 1983·23 cites·12 claims
- 0352US4697199ASemiconductor protection device having a bipolar transistor and an auxiliary field effect transistorPHILIPS CORP·Filed 1986·Granted Sep 29, 1987·18 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →