Patent US 3809888A
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| Patent number | US 3809888A |
|---|---|
| Title | Photographic apparatus |
| Inventors | W Stock, M Balsiger, W Beran |
| Company | Tektronix Inc |
| Filing date | 1971-09-13 |
| Grant date | 1974-05-07 |
| Cites |
| Patent number | US 3809888A |
|---|---|
| Title | Photographic apparatus |
| Inventors | W Stock, M Balsiger, W Beran |
| Company | Tektronix Inc |
| Filing date | 1971-09-13 |
| Grant date | 1974-05-07 |
| Cites |