Patent US 2280531A
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| Patent number | US 2280531A (click link for details and documents via Google Patents) |
|---|---|
| Title | Oscillograph apparatus |
| Inventors | Donald E Norgaard |
| Company | General Electric |
| Filing date | 1940-11-01 |
| Grant date | 1942-04-21 |
Cited By:
| Patent | Title | Inventors | Assignee | Granted |
|---|---|---|---|---|
| Patent US 4251814A | Time dot display for a digital oscilloscope | Thomas P. Dagostino | Tektronix Inc | 1981-02-17 |
Very early sampling oscilloscope patent.