"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 4066334 | Liquid crystal light deflector An optical modulation device such as an electrical switchable prism, which may be used as a light deflector, or an electrically switchable lens, comprises a volume of liquid crystal material, means for applying electric or magnetic bias fields across the ... | 01/03/1978 |