Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4782693 | Process for checking and/or adjusting and/or assembling valves and arrangement and device for carrying out the process | Rainer Heyer, Gunter Stiefeling, Josef Otulak | 1988-11-08 |
| 4305302 | Volumetric measurement of a gas flow | Heinz Holzem, Helmut Kehrmann | 1981-12-15 |