Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5458155 | System and method for slipliner renovation of semi-elliptical conduits | — | 1995-10-17 |
| 5419632 | Method and apparatus for continuous mixing and injection of foamed cement grout | — | 1995-05-30 |
| 5241993 | Method for grouting cavities using a pumpable cement grout | — | 1993-09-07 |
| 5141363 | Mobile train for backfilling tunnel liners with cement grout | — | 1992-08-25 |
| 5063967 | Pumpable cement grout | — | 1991-11-12 |