Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6247875 | Method and apparatus utilizing a hollow beam for constructing subterranean walls comprised of granular material | Fred C. Schmednecht | 2001-06-19 |
| 6030150 | Method and apparatus for constructing subterranean walls comprised of granular material | Fred C. Schmednecht | 2000-02-29 |