Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850214 | Method of fabricating a projection for resistance welding | Jurg Opprecht | 1989-07-25 |
| 4795295 | Rupturable can member as well as method and apparatus for its production | Werner Urech | 1989-01-03 |