"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 |
| 7020355 | Switchable surfaces A substrate having a surface with reversibly switchable properties. The surface comprises a nanolayer of a material that switches from a first conformation state to a second conformation state when an external stimulus is applied. When the nanolayer is in the first ... | 03/28/2006 |
| 6906388 | SEU hard majority voter for triple redundancy Majority voting between triple redundant integrated circuits is used in order to provide an SEU hardened output signal. Accordingly, an input signal is processed in a predetermined manner to provide a first signal, the input signal is processed in the same manner to... | 06/14/2005 |
| 6667520 | SEU hard majority voter for triple redundancy Majority voting between triple redundant integrated circuits is used in order to provide an SEU hardened output signal. Accordingly, an input signal is processed in a predetermined manner to provide a first signal, the input signal is processed in the sam... | 12/23/2003 |
| 6184725 | Circuit arrangement for isolated voltage and/or current measurement A circuit arrangement for making isolated voltage and/or current measurements on a transmission line is characterized in that a shunt branch between the go conductor (+) and the return conductor (-) contains a series combination of a transformer (T), a fi... | 02/06/2001 |
| 5767955 | Short-width pulse generating apparatus for measurement of reflection point, sampling apparatus for measurement of reflection point and reflection point measuring apparatus A short-width pulse generating apparatus for use in measurement of a reflection point, a sampling apparatus for use in measurement of a a reflection point, and a reflection point measuring apparatus each being able to specify a reflection position produce... | 06/16/1998 |
| 5559466 | Semiconductor relay for transmitting high frequency signals A semiconductor relay has two output MOSFET pairs, each of which is series-connected with the other. Each MOSFET pair is comprised of two MOSFETs series-connected oppositely to each other, and these MOSFETs are controlled to turn on or off simultaneously.... | 09/24/1996 |
| 5495211 | Reconfiguration microstrip transmission line network The present invention discloses a reconfigurable microstrip transmission line network having a microstrip circuit consisting of an RF ground plan separated from a transmission layer by a dielectric layer. The transmission layer comprises a silicon materia... | 02/27/1996 |
| 5475333 | Built-in drive power-source semiconductor device A built-in drive-power-source semiconductor device of low cost having a good switching characteristic and a decreased switching loss. In operation, a reference charge potential is applied to a charging IGBT by a first constant voltage diode thereby turnin... | 12/12/1995 |
| 4904882 | Superconducting optical switch A combination of optical interconnect technology with superconducting matal to form a superconducting neural network array. Superconducting material in a matrix has the superconducting current decreased in one filament of the matrix by interaction of the... | 02/27/1990 |
| 4176288 | Zero voltage switching solid state relay A solid state relay or controlled switch for connecting an AC power source to a load includes a solid state switching circuit in which a semiconductor controlled rectifier element, such as a photothyristor, thyristor or light-AC controlled element, is ign... | 11/27/1979 |
| 3986050 | Firing arrangement for a number of electric valves, particularly of thyristors A firing arrangement for firing a number of electric valves is disclosed in which a body is provided for reflecting and/or refracting electromagnetic radiation toward electromagnetic radiation detectors included in the individual firing circuits controlli... | 10/12/1976 |
| 3956727 | Laser activated superconducting switch A superconducting switch or bistable device comprising a superconductor in a cryogen maintaining a temperature just below the transition temperature, having a window of the proper optical frequency band for passing a laser beam which may impinge on the su... | 05/11/1976 |