Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885994 | Armor penetration resistance enhancement | Marvin E. Backman, Kent G. Whitman, Robert G. S. Sewell | 1989-12-12 |
| 4355562 | Armor | Robert G. S. Sewell, John K. Pringle, Marvin E. Backman | 1982-10-26 |