Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4310069 | Method of reducing noise during throttling of vapor and gas streams | Fritz Kolb, Otto Ziegert | 1982-01-12 |
| 4274439 | Control valve having a disc shaped throttle | Fritz Kolb, Otto Ziegert, Hans-Jürgen Bender, Manfred Schmitt | 1981-06-23 |