Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6247875 | Method and apparatus utilizing a hollow beam for constructing subterranean walls comprised of granular material | Dana A. Schmednecht | 2001-06-19 |
| 6030150 | Method and apparatus for constructing subterranean walls comprised of granular material | Dana A. Schmednecht | 2000-02-29 |
| 5758993 | Method and apparatus for forming successive overlapping voids in the ground along a predetermined course of travel and for producing a subterranean wall therein | Eric J. Schmednecht | 1998-06-02 |
| 4379658 | Method and apparatus for constructing slurry walls | — | 1983-04-12 |
| 4249836 | Method and apparatus for building below ground slurry walls | — | 1981-02-10 |