Patent US 4249112A
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| Patent number | US 4249112A (click link for details and documents via Google Patents) |
|---|---|
| Title | Dynamic focus and astigmatism correction circuit |
| Inventors | Barry A. McKibben |
| Company | Tektronix Inc |
| Filing date | 1979-09-18 |
| Grant date | 1981-02-03 |