"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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| Application No. | Application Title | Issue Date |
| 20060071561 | Electromagnetic power device An electromagnetic power device includes a base forming a guide section, a stator on which an electromagnet is mounted, a mover that is guided by the guide section to reciprocally and linearly move and carrying a permanent magnet, a crankshaft to which the mover is coup... | 04/06/2006 |