Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819560 | Detonator firing element | Vivian Edward Patz | 1989-04-11 |
| 4796531 | Mining method | Raymond Catherall Atkins | 1989-01-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819560 | Detonator firing element | Vivian Edward Patz | 1989-04-11 |
| 4796531 | Mining method | Raymond Catherall Atkins | 1989-01-10 |