Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7931306 | Vented gas riser apparatus | John A. Samudovsky | 2011-04-26 |
| 7753412 | Vented gas riser apparatus | John A. Samudovsky | 2010-07-13 |
| 7740284 | Vented gas riser apparatus | John A. Samudovsky | 2010-06-22 |
| 4606565 | Pipe couplings | — | 1986-08-19 |
| 4538841 | Insulated pipe couplings | — | 1985-09-03 |