Patent US 3594652A
| Patent number | US 3594652A (click link for details and documents via Google Patents) |
|---|---|
| Title | Low impedance input, variable attenuation amplifier |
| Inventors | Johannes L Springer |
| Company | Tektronix Inc |
| Filing date | 1969-04-07 |
| Grant date | 1971-07-20 |