Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315792 | Method for producing sealing faces on valves | Werner Sefz | 1994-05-31 |
| 5303509 | Apparatus for producing sealing faces on valves | Werner Sefz | 1994-04-19 |
SS
Siegfried Schweizer
Overall (All Time): #2,293,683 of 4,157,543Top 60%
2
Patents All Time