Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11009174 | Method and apparatus for replacing underground pipe | David B Crafts, Maxwell Frank Darrow | 2021-05-18 |
| 10598306 | Method and apparatus for replacing underground pipe | David B Crafts, Maxwell Frank Darrow | 2020-03-24 |
| 8702349 | Pipe bursting apparatus | Robert Ding | 2014-04-22 |
| 6799923 | Trenchless water pipe replacement device and method | Robert W. Carter | 2004-10-05 |
| 6793442 | Device and method for trenchless replacement of underground pipe | Robert W. Carter | 2004-09-21 |
| 6524031 | Device and method for trenchless replacement of underground pipe | Robert W. Carter | 2003-02-25 |
| 6305880 | Device and method for trenchless replacement of underground pipe | Robert W. Carter | 2001-10-23 |
| 4957672 | Method of forming a sealing gasket for reticulated foam filter | — | 1990-09-18 |