Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6832459 | Methods and apparatus for forming and placing generally horizontal structures | — | 2004-12-21 |
| 6616380 | Subterranean structures and methods for constructing subterranean structures | Robert L. Russell | 2003-09-09 |
| 6185847 | Continuous shovel | Gerald Kaschmitter | 2001-02-13 |