Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342520 | Filter for a rockdrill | — | 1994-08-30 |
| 5325926 | Reversible casing for a down-the-hole percussive apparatus | Warren T. Lay | 1994-07-05 |
| 5277098 | On-off valve for hydraulic rockdrill | Thomas J. Mlasgar | 1994-01-11 |