Patent US 4283655A
Patent number | US 4283655A (click link for details and documents via Google Patents) |
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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 |