Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4586827 | Information system | Hermann Hirsch | 1986-05-06 |
| 4456835 | Method of operating a load from alternating current mains and circuit arrangement therefor | Hermann Dum | 1984-06-26 |