Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4755003 | Cutter bit assembly with resilient bit retainer | Robert L. Morris | 1988-07-05 |
| 4684176 | Cutter bit device | Leroy E. Den Besten | 1987-08-04 |
| 4474488 | Retainer system for roof-mine tool bit | Robert L. Morris | 1984-10-02 |
| 4462638 | Mining bit with improved split ring retainer | Leroy E. DenBesten | 1984-07-31 |