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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 5225842 | Vehicle tracking system employing global positioning system (GPS) satellites A tracking system employing global positioning system (GPS) satellites provides extremely accurate position, velocity, and time information for vehicles or any other animate or inanimate object within any mobile radio communication system or information s... | 07/06/1993 |
