Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6126399 | Feathering propeller | John McKenzie Blundell | 2000-10-03 |
| 4921173 | Methods of mineral breaking and apparatus used therefor | — | 1990-05-01 |
| 4662571 | Mineral impact breaking apparatus | George J. MacDonald, by Evelyn M. H. MacDonald, exectrix | 1987-05-05 |
| 4586663 | Tip assembly for rotary mineral breakers | — | 1986-05-06 |
| 4575013 | Mineral breaker | — | 1986-03-11 |