Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946206 | Bidirectional corrugated pipe-rib seal | Stephen L. Roe, Eldon G. Bonnema | 1990-08-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946206 | Bidirectional corrugated pipe-rib seal | Stephen L. Roe, Eldon G. Bonnema | 1990-08-07 |