Patent US 4974167A
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| Patent number | US 4974167A (click link for details and documents via Google Patents) |
|---|---|
| Title | Erasable data acquisition and storage instrument |
| Inventors | Rolf P. Anderson, James B. Proebstel |
| Company | Tektronix Inc |
| Filing date | 1989-02-28 |
| Grant date | 1990-11-27 |