Patent US 5107253A
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| Patent number | US 5107253A (click link for details and documents via Google Patents) |
|---|---|
| Title | Stylus position detection system for optical touch panel |
| Inventors | R. David Meadows |
| Company | Tektronix Inc |
| Filing date | 1989-11-13 |
| Grant date | 1992-04-21 |