Patent US 4808879A
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| Patent number | US 4808879A (click link for details and documents via Google Patents) |
|---|---|
| Title | Post-deflection acceleration and scan expansion electron lens system |
| Inventors | Scott A. Maxson, John H. Sonneborn |
| Company | Tektronix Inc |
| Filing date | 1987-06-05 |
| Grant date | 1989-02-28 |