Patent US 3457505A
| Patent number | US 3457505A (click link for details and documents via Google Patents) |
|---|---|
| Title | Oscillographic instrument for separately viewing portions of an input signal |
| Inventors | Phil Crosby |
| Company | Tektronix Inc |
| Filing date | 1966-02-18 |
| Grant date | 1969-07-22 |