Patent US 4389551A
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| Patent number | US 4389551A (click link for details and documents via Google Patents) |
|---|---|
| Title | Probe-actuated guard shield switch |
| Inventors | Florian C. Deibele, William F. Schell |
| Company | Tektronix Inc |
| Filing date | 1981-07-13 |
| Grant date | 1983-06-21 |