"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 |
| 5351115 | Color electrophotographic method and apparatus employed therefor A color electrophotographic apparatus employing a plurality of image forming units each including a photoreceptor and a corona charger, and using toner. In the apparatus, the image forming units are arranged to be displaceable, with an exposure position o... | 09/27/1994 |