Patent US 4785419A
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| Patent number | US 4785419A (click link for details and documents via Google Patents) |
|---|---|
| Title | Logarithmic amplifier calibrator |
| Inventors | Douglas K. Huffman |
| Company | Tektronix Inc |
| Filing date | 1987-11-16 |
| Grant date | 1988-11-15 |