Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4234301 | Gasket feeding apparatus for an inplace gasket belling machine | Leonard L. Hayes | 1980-11-18 |
| 4218208 | Inplace gasket belling machine | Leonard L. Hayes | 1980-08-19 |
| 4217096 | Apparatus for heating plastic pipe | Leonard L. Hayes | 1980-08-12 |
| 4206538 | Inplace gasket belling method and apparatus | Leonard L. Hayes | 1980-06-10 |
| 4204823 | Inplace gasket belling machine | Leonard L. Hayes | 1980-05-27 |
| 4203721 | Method of heating plastic pipe | Leonard L. Hayes | 1980-05-20 |
| 4181698 | Method of belling a plastic pipe | Leonard L. Hayes | 1980-01-01 |