"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 |
| 3953631 | Dust collection mats A dust control mat having a pile fabric upper surface and a bottom calendered rubber stock sheet which employs an anti-tear strip located perpendicular to the grain or calendered direction of the rubber stock sheet between the rubber sheet and a latex bac... | 04/27/1976 |