ES

Erwin O. F. Siefken

U.S. Philips: 1 patents #4,133 of 8,851Top 50%
Overall (All Time): #3,923,592 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4814669 Method of determining the position of an electron beam in a shadow mask display tube Jochem Herrmann 1989-03-21