Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5216199 | Lead-free primed rimfire cartridge | Robert K. Bjerke, James P. Ward, Walter H. Stevens | 1993-06-01 |
| 4963201 | Primer composition | Robert K. Bjerke, James P. Ward, Delbert O. Ells | 1990-10-16 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5216199 | Lead-free primed rimfire cartridge | Robert K. Bjerke, James P. Ward, Walter H. Stevens | 1993-06-01 |
| 4963201 | Primer composition | Robert K. Bjerke, James P. Ward, Delbert O. Ells | 1990-10-16 |