HG

Hendrik C. De Graaff

U.S. Philips: 2 patents #2,537 of 8,851Top 30%
Overall (All Time): #2,344,888 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4697199 Semiconductor protection device having a bipolar transistor and an auxiliary field effect transistor Wilhelmus G. Voncken 1987-09-29
4409606 High breakdown voltage semiconductor device Kornelis J. Wagenaar, Johannes A. Appels 1983-10-11