Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889348 | Spiral groove seal system for high vapor-pressure liquids | Donald E. Amundson, Jon Hamaker, Josef Sedy | 1989-12-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889348 | Spiral groove seal system for high vapor-pressure liquids | Donald E. Amundson, Jon Hamaker, Josef Sedy | 1989-12-26 |