Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5388868 | Circular coupling system | — | 1995-02-14 |
| 5333916 | External pipe coupling system with inflatable gasket | William A. Burkit | 1994-08-02 |
| 5224741 | Thrust restraint for pipe coupling system | Milton P. Chernack, James H. Sandler | 1993-07-06 |
| 5201550 | Pipe coupling system with thrust restraint | — | 1993-04-13 |
| 5092633 | Pipe coupler with thrust restraint | — | 1992-03-03 |
| 5002317 | Internal expansion coupling device | — | 1991-03-26 |
| 4997212 | Internal expansion pipe coupling member | — | 1991-03-05 |
| 4927189 | Internal expansion coupling device | — | 1990-05-22 |