Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11181214 | Pipe coupling | Malcolm Pridham | 2021-11-23 |
| 7846365 | Method of manufacture of a nut and tail assembly | David Chelchowski | 2010-12-07 |
| 7455328 | Collet for pipe coupling | David Chelchowski | 2008-11-25 |
| D558037 | O-ring | David Chelchowski, Malcolm Pridham | 2007-12-25 |
| 7270351 | Pipe coupling | David Chelchowski, Luke C. Raymond | 2007-09-18 |
| 7178838 | Nut and tail assembly | David Chelchowski | 2007-02-20 |
| 6974162 | Pipe coupling | David Chelchowski, Luke C. Raymond | 2005-12-13 |
| 6702336 | Coupling device for polymeric pipes | David Chelchowski | 2004-03-09 |