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"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 |
| 5417238 | Tillage implements A tillage element for use in a plough, harrow or the like is described which comprises a disc having a substantially planar portion and an inclined flange portion extending from the periphery of said central portion, an abrupt transition being provided fr... | 05/23/1995 |
| 4164325 | High-pressure-rotary-nozzle apparatus A high-pressure rotary nozzle for cleaning the insides of pipes and vessels associated with the agricultural and petroleum industries, as well as in geothermal plants. The rotary nozzle provides a plurality of high-velocity, rotating, fluid streams to rem... | 08/14/1979 |
