Patent US 4729639A
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| Patent number | US 4729639A (click link for details and documents via Google Patents) |
|---|---|
| Title | Dual frequency addressable liquid crystals and methods of use |
| Inventors | Robert L. Hubbard |
| Company | Tektronix Inc |
| Filing date | 1984-04-24 |
| Grant date | 1988-03-08 |