Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9482374 | Seal having projections and coupling having pockets | — | 2016-11-01 |
| D687932 | Kinked O-ring | — | 2013-08-13 |
| 8136847 | Coupling having angularly oriented shoulder surfaces | Scott D. Madara, John W. Pierce, Charles E. Wilk, Jr., Douglas R. Dole | 2012-03-20 |
| 7988207 | Couplings having stiffening ribs and keys with oppositely disposed camming surfaces | Douglas R. Dole | 2011-08-02 |
| D616072 | Rigid pipe coupling | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2010-05-18 |
| D614269 | Rigid pipe coupling segment | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2010-04-20 |
| D614272 | Gasket | Scott D. Madara | 2010-04-20 |
| D612461 | Rigid pipe coupling segment | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2010-03-23 |
| D608866 | Flexible pipe coupling segment | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2010-01-26 |
| D608865 | Flexible pipe coupling | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2010-01-26 |
| D608867 | Flexible pipe coupling segment | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2010-01-26 |
| D605734 | Rigid pipe coupling | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2009-12-08 |
| D605739 | Gasket | Scott D. Madara | 2009-12-08 |
| D600784 | Flexible pipe coupling | John W. Pierce, Douglas R. Dole, Scott D. Madara, Ahmad Sith | 2009-09-22 |
| 6666062 | Pipe preparation device | Douglas R. Dole | 2003-12-23 |
| 5603508 | Gasket for lateral outlet segmented pipe coupling | Douglas R. Dole | 1997-02-18 |