Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6019434 | Point attack bit | — | 2000-02-01 |
| 4952001 | Mining bit preload retainer | — | 1990-08-28 |
| 4763956 | Mining tool retainer | — | 1988-08-16 |
| 4678238 | Coolant sleeve for mining tools | — | 1987-07-07 |
| 4632195 | Roof drill system | — | 1986-12-30 |
| 4515230 | Roof drill bit | Thomas C. Means | 1985-05-07 |
| 4484783 | Retainer and wear sleeve for rotating mining bits | — | 1984-11-27 |
| 4453854 | Unitized drill steel and method of manufacturing | — | 1984-06-12 |
| 4299510 | Drill steel and method of fabrication | Donald K. Chrise | 1981-11-10 |
| 4206821 | Roof drill and drill rod system | — | 1980-06-10 |
| 4190125 | Drill bit and steel combination for improved fluid flow | Ralston L. Hamlin | 1980-02-26 |
| 4190128 | Roof drill bit with hexagonal body portion | — | 1980-02-26 |