Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886281 | Sealing ring having a sealing surfacer with a recessional annular projection | Peter Ehrmann, Karl-Heinz Spies | 1989-12-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886281 | Sealing ring having a sealing surfacer with a recessional annular projection | Peter Ehrmann, Karl-Heinz Spies | 1989-12-12 |