Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8764069 | Stepped down grip ring for use in pipe couplings and pipe coupling incorporating same | David Chelchowski, Malcolm Pridham | 2014-07-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8764069 | Stepped down grip ring for use in pipe couplings and pipe coupling incorporating same | David Chelchowski, Malcolm Pridham | 2014-07-01 |