Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859543 | Earth working tool having a working element fabricated from cemented tungsten carbide compositions with enhanced properties | Edward V. Conley | 1989-08-22 |
| 4817743 | Butterfly-type shim having semi-opened bottom and double sandwich braze joint produced therewith | Stephen P. Stiffler, Raymond D. Evans | 1989-04-04 |
| 4389074 | Mine tools utilizing copper-manganese nickel brazing alloys | — | 1983-06-21 |
| 4189013 | Roof drill bit | Wayne Adams, Harry L. Seibert | 1980-02-19 |