Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8286731 | Method and apparatus for constructing deep vertical boreholes and underground cut-off walls | — | 2012-10-16 |
| 4877358 | Method and apparatus of constructing a novel underground impervious barrier | — | 1989-10-31 |
| 4728226 | Method and apparatus for forming reinforced concrete walls with continuous steel reinforcement | — | 1988-03-01 |
| 4696607 | Slurry trench method and apparatus for constructing underground walls | — | 1987-09-29 |
| 4582453 | Method and apparatus for in situ forming underground panelized concrete walls with improved joint structure | — | 1986-04-15 |
| 4496268 | Method and apparatus for constructing reinforced concrete walls in the earth | — | 1985-01-29 |