JS

Joannus H. F. C. Sieben

U.S. Philips: 2 patents #2,537 of 8,851Top 30%
Overall (All Time): #2,371,650 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4288048 Cassette — 1981-09-08
4234140 Magnetic tape cassette drive system Cornelis P. Van Nie, Franz Werner, Gerhard Maryschka 1980-11-18