Patent US 4283655A
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| Patent number | US 4283655A (click link for details and documents via Google Patents) |
|---|---|
| Title | Cathode ray tube with multiple internal graticules |
| Inventors | Ralph A. Mossman, Kenneth R. Stinger |
| Company | Tektronix Inc |
| Filing date | 1979-10-26 |
| Grant date | 1981-08-11 |