Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687997 | Sealing gasket with lubricant rib and retainer element | — | 1997-11-18 |
| 5286440 | Method for the production of a symmerical oval concrete pipe | — | 1994-02-15 |
| 5251867 | Header pallet | — | 1993-10-12 |
| 5215673 | Apparatus for the production of a symmetrical oval concrete pipe | — | 1993-06-01 |
| 4538822 | Seal gasket specifically configured to seal the joint between adjacent oval concrete pipes | — | 1985-09-03 |
| 4279425 | Dual seal gasket | — | 1981-07-21 |
| 4262701 | Concrete pipe lift hole plug | — | 1981-04-21 |