Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10408001 | Self contained/self powered hydraulic catwalk | Bryson Davis | 2019-09-10 |
| 9863193 | Hydraulically powered trough extension for a pipe handling, pipe laydown and pipe pickup machine | — | 2018-01-09 |
| 6343981 | Vehicle for scraping a floor | — | 2002-02-05 |
| 5029558 | Rotary vee engine | Robert W. Sullivan, Tommie J. Holder | 1991-07-09 |
| 5014653 | Rotary vee engine | Robert W. Sullivan, Tommie J. Holder | 1991-05-14 |
| 5009198 | Rotary vee engine | Robert W. Sullivan, Tommie J. Holder | 1991-04-23 |
| 4960082 | Rotary vee engine | Robert W. Sullivan, Tommie J. Holder | 1990-10-02 |
| 4867107 | Rotary vee engine | Robert W. Sullivan, Tommie J. Holder | 1989-09-19 |
| 4648358 | Rotary vee engine | Robert W. Sullivan, Tommie J. Holder | 1987-03-10 |