Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7076346 | Automated continuous haulage system | Robert H. Sturges, Jr., Amnart Kanarat | 2006-07-11 |
| 6945738 | Method and apparatus for safety protection of temporary roof support | Roger L. O'Quinn, David Wallace, Chitra Ranganathan | 2005-09-20 |