Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6050344 | Rotary garden tool | Roger J. Morrell | 2000-04-18 |
| 5335977 | Double acting bit holder | Roger J. Morrell, Peter L. Ruzzi | 1994-08-09 |
| 5123710 | Impact assisted segmented cutterhead | Roger J. Morrell, Peter L. Ruzzi | 1992-06-23 |
| 5078219 | Concave drag bit cutter device and method | Roger J. Morrell | 1992-01-07 |
| 5013093 | Universal ripper miner | Roger J. Morrell | 1991-05-07 |
| 4501448 | Universal ripper miner | Roger J. Morrell | 1985-02-26 |