Patent US 4920311A
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| Patent number | US 4920311A |
|---|---|
| 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 |
| Cites |