RH

Rolf D. Hoppmanns

U.S. Philips: 1 patents #4,133 of 8,851Top 50%
Overall (All Time): #3,967,343 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4639801 Loading mechanism for a magnetic tape cassette apparatus Walter Steup, Willibald Wieczorek, Franz Beitler 1987-01-27