Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4451179 | Method and apparatus for affixing a roof bolting plate to a mine roof | — | 1984-05-29 |
| 4372708 | Resin capsule and method for grouting anchor elements in holes of various lengths | Robert E. Dillon | 1983-02-08 |
| 4339006 | Method and apparatus for mine roof drilling | Randall W. Ojanen | 1982-07-13 |
| 4327947 | Keeper spring for connecting mining tool to work tool holder | — | 1982-05-04 |
| 4291799 | Parallel tube resin capsules | — | 1981-09-29 |
| 4269704 | Screen for particle separation | — | 1981-05-26 |