FD

Friedrich Dannhaeuser

SA Siemens Aktiengesellschaft: 2 patents #6,658 of 22,248Top 30%
Overall (All Time): #2,323,981 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4928098 Method for code protection using an electronic key — 1990-05-22
4887312 Method and apparatus for transmission of optical data between two electrically separated transmitting receiving units — 1989-12-12