Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888496 | Circuitry for adjusting the amplitude of analog signals | — | 1989-12-19 |
| 4864155 | Circuitry for suppressing audible noise | — | 1989-09-05 |
| 4636379 | Process for producing calcium hydroxide | Heinz Bestek, Werner Ewald, Hans-Peter Hennecke, Alfred Roeder | 1987-01-13 |
| 4242144 | Bituminous mixed composition and filler for same containing non-hygroscopic crystal water-containing substances | Klaus Bergmann, Gottfried Kilian, Heinz Reppel | 1980-12-30 |