Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8973605 | Actuating device for housed or housingless valves | — | 2015-03-10 |
| 4844630 | Method and circuit arrangement for protection of typewriters or similar machines against consequences of electrostatic discharge | Klaus Hagen | 1989-07-04 |
| 4797018 | Ribbon cassette and method for operating an electronically controlled typewriter | Norbert Hofmann | 1989-01-10 |