Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D636470 | Pipe coupling segment | Douglas R. Dole | 2011-04-19 |
| D629082 | Pipe coupling | Douglas R. Dole | 2010-12-14 |
| D629083 | Pipe coupling segment | Douglas R. Dole | 2010-12-14 |
| D423643 | Valve housing | W. Ross McLennan, Kevin J. Simko, Douglas R. Dole | 2000-04-25 |
| 5758909 | Rotation inhibiting quick connect connector for grooved pipe | Douglas R. Dole | 1998-06-02 |