Patent US 4137479A
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| Patent number | US 4137479A (click link for details and documents via Google Patents) |
|---|---|
| Title | Cathode ray tube having an electron lens system including a meshless scan expansion post deflection acceleration lens |
| Inventors | Bozidar Janko |
| Company | Tektronix Inc |
| Filing date | 1977-01-06 |
| Grant date | 1979-01-30 |