"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 |
| 5097612 | Illuminated traffic control sign An illuminated traffic control sign transforms a conventional passenger automobile into a traffic control vehicle. The body of the sign is formed from a flexible sheet of weather resistant material. The sign is ordinarily stored under the luggage compartm... | 03/24/1992 |