"The radio craze will die out in time."
Thomas Edison ; 1922
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| Number | Title | Issue Date |
| 4356438 | Motor speed control system A motor speed control system utilizing a pulse duty controlling element including a core of an amorphous, magnetically soft material having a first and a second coil disposed thereon. A first set of pulses are applied to one end of the first coil while a ... | 10/26/1982 |