Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4572075 | Methods and apparatus for loading a borehole with explosives | John T. Day | 1986-02-25 |
| 4528049 | Seismic explosive composition | John T. Day | 1985-07-09 |
| 4334476 | Primer cup | John T. Day | 1982-06-15 |