Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7150446 | Dual lift system | James T. Cash, Glenn H. Schmidt | 2006-12-19 |
| 6978977 | Dual lift system | James T. Cash, Glenn H. Schmidt | 2005-12-27 |
| 6783111 | Dual lift system | James T. Cash, Glenn H. Schmidt | 2004-08-31 |
| 6669472 | Dual lift system | James T. Cash, Glenn H. Schmidt | 2003-12-30 |