Patent US 4920311A
| Patent number | US 4920311A (click link for details and documents via Google Patents) |
|---|---|
| Title | User selection of meter ballistics |
| Inventors | Robert Bateman, Donald R. Christensen |
| Company | Robert Bateman, Christensen Donald R |
| Filing date | 1988-10-27 |
| Grant date | 1990-04-24 |