Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4477714 | Method of leak proof attachment of a flange-type sheet metal element in the bore of a valve tappet | Helmut Zorn, Karl-Heinz Spiess | 1984-10-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4477714 | Method of leak proof attachment of a flange-type sheet metal element in the bore of a valve tappet | Helmut Zorn, Karl-Heinz Spiess | 1984-10-16 |