"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 |
| 6731072 | Light generator for a rotatable object A light generator includes a generator housing, an axle, a magnet, a coil device, a lamp unit, and a resistance unit. The generator housing is adapted to be secured to a rotatable object for co-rotation therewith, and is formed with an axle hole. The axle is mounted... | 05/04/2004 |
| 5604404 | Drive circuit for a cathode ray tube A video signal is supplied from an emitter coupled differential amplifier to a first grid electrode of a cathode ray tube. A blanking pulse signal is supplied to the base of a transistor, which constitutes a constant-current source for the differential am... | 02/18/1997 |
| 4146822 | Electrophotographic copier In an electrophotographic copier a fusing station is provided at which a toner image previously formed on a copy carrier is fixed on the carrier by fusing. The fusing station includes a flash tube which, when discharged, produces the heat required for the... | 03/27/1979 |