Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6520719 | Apparatus for installing a flexible cured in place lateral seal in an existing main pipeline | John Tweedie | 2003-02-18 |
| 6068725 | Method of installation of a flexible cured in place lateral seal in an existing main pipeline | John Tweedie, Philip M. Smith, Jeff P. Wells, Kevin P. Murray | 2000-05-30 |
| 6029726 | Apparatus for installing a flexible cured in place lateral seal in an existing main pipeline | John Tweedie, Philip M. Smith, Jeff P. Wells, Kevin P. Murray | 2000-02-29 |