Patent US 4605970A
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| Patent number | US 4605970A (click link for details and documents via Google Patents) |
|---|---|
| Title | Method and apparatus for calibrating an optical document digitizer |
| Inventors | Jeffrey A. Hawkins |
| Company | Tektronix Inc |
| Filing date | 1984-10-01 |
| Grant date | 1986-08-12 |