Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644202 | Blasting arrangement | Peter J Duniam, Peter J McCallum, William H Birney, Vernon West, Vivian Edward Patz | 2003-11-11 |
| 6085659 | Electronic explosives initiating device | Christo Andre Beukes, Vivian Edward Patz, Stafford A. Smithies, Ray Frederick Greyvenstein | 2000-07-11 |