JR

Johannus J. Roelofsma

U.S. Philips: 1 patents #4,133 of 8,851Top 50%
Overall (All Time): #3,937,051 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4863625 Titanium-containing and cobalt-containing manganese-zinc ferrite core and method of manufacturing same Theodorus G. W. Stijntjes 1989-09-05