Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5152323 | Plastic-lined pipe | David A. Shotts | 1992-10-06 |
| 5054679 | Apparatus for manufacturing plastic-lined pipe | David A. Shotts | 1991-10-08 |
| 5000369 | Method and apparatus for manufacturing plastic-lined pipe | David A. Shotts | 1991-03-19 |
| 4957314 | Conduit coupling assembly | David A. Shotts | 1990-09-18 |
| 4549756 | Conduit coupling assembly | — | 1985-10-29 |
| 4441238 | Continuous production of polished and buffed tubing | Humberto A. Hijuelos, Giulio Scartozzi, Lawrence P. Vollmuth | 1984-04-10 |