Patent US 4277722A
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| Patent number | US 4277722A (click link for details and documents via Google Patents) |
|---|---|
| Title | Cathode ray tube having low voltage focus and dynamic correction |
| Inventors | Ken Hawken, Bozidar Janko |
| Company | Tektronix Inc |
| Filing date | 1979-05-14 |
| Grant date | 1981-07-07 |