Issued Patents All Time
Showing 25 most recent of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276360 | Combination sealing member and pipe couplings | Douglas R. Dole, Michael V. Porter | 2025-04-15 |
| 10962152 | Method of preparing a pre-assembled pipe coupling | Douglas R. Dole, Michael V. Porter | 2021-03-30 |
| 9791083 | Fitting for joining pipe elements | Douglas R. Dole | 2017-10-17 |
| 9726310 | Combination sealing member and pipe couplings | Douglas R. Dole, Michael V. Porter | 2017-08-08 |
| 8820795 | Fitting for joining pipe elements | Douglas R. Dole | 2014-09-02 |
| 8733799 | Combination sealing member and pipe couplings | Douglas R. Dole, Michael V. Porter | 2014-05-27 |
| 8646165 | Method of securing pipe elements end to end | Douglas R. Dole, Michael S. Pigott | 2014-02-11 |
| 8500174 | Pipe coupling having compression band | — | 2013-08-06 |
| 8424918 | Deformable mechanical pipe coupling with shoulder pipe elements | Douglas R. Dole, Michael S. Pigott | 2013-04-23 |
| 8079129 | Installation-ready pipe coupling method of manufacture | Douglas R. Dole | 2011-12-20 |
| 8069547 | Installation-ready pipe coupling method of manufacture | Douglas R. Dole | 2011-12-06 |
| 7712796 | Deformable mechanical pipe coupling | Douglas R. Dole, Michael S. Pigott | 2010-05-11 |
| 7654587 | Mechanical pipe coupling having spacers | Douglas R. Dole | 2010-02-02 |
| 7591055 | Method of securing facing end portions of pipe elements | Douglas R. Dole, Michael S. Pigott | 2009-09-22 |
| D600326 | Pipe coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2009-09-15 |
| D598077 | Pipe coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2009-08-11 |
| 7401819 | Mechanical pipe coupling having spacers | Douglas R. Dole | 2008-07-22 |
| D570458 | Mechanical coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2008-06-03 |
| D568970 | Pipe coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2008-05-13 |
| D568971 | Mechanical coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2008-05-13 |
| D568451 | Mechanical coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2008-05-06 |
| 7341287 | Deformable mechanical pipe coupling | Douglas R. Dole, Michael S. Pigott | 2008-03-11 |
| D560764 | Mechanical coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2008-01-29 |
| D558307 | Pipe coupling | Douglas R. Dole, Michael V. Porter, William A. Nagle | 2007-12-25 |
| 7086131 | Deformable mechanical pipe coupling | Douglas R. Dole, Michael S. Pigott | 2006-08-08 |