Patent US 3754159A
| Patent number | US 3754159A (click link for details and documents via Google Patents) |
|---|---|
| Title | Automatic focus control circuit for a cathode ray oscilloscope |
| Inventors | R Andrews |
| Company | Tektronix Inc |
| Filing date | 1971-12-10 |
| Grant date | 1973-08-21 |