Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4602974 | Method of sealing pipe | Douglas K. Chick | 1986-07-29 |
| 4581247 | Lining of pipelines and passageways | — | 1986-04-08 |
| 4581085 | Lining of pipelines or passageways | — | 1986-04-08 |
| 4577388 | Method of cutting apertures in lining in underground pipes | — | 1986-03-25 |
| 4446181 | Manufacture of tubular laminates | — | 1984-05-01 |
| 4442891 | Cutters | — | 1984-04-17 |
| 4439469 | Formation of a lining in pipelines | — | 1984-03-27 |
| 4401696 | Lining of pipelines and passageways | — | 1983-08-30 |
| 4390574 | Felt material of layer of fine denier felt and layer of coarse denier felt | — | 1983-06-28 |
| 4385885 | Lining of passageways | — | 1983-05-31 |
| 4366012 | Impregnation process | — | 1982-12-28 |