Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7200502 | Dual connection power line parameter analysis method and system A method and apparatus is disclosed for determining the power line parameters of a system. Specifically, there is provided a method comprising perturbing a voltage waveform through a first connection, measuring a characteristic of the perturbation through a second c... | 04/03/2007 |
| 5661442 | Amplitude control system having parallel integrating signal paths An amplitude control system uses a pair of parallel integrators to rapidly adjust the amplitude of a test signal between two precisely determined power levels in an RF signal generator. The amplitude control system initializes a first power level by switc... | 08/26/1997 |
| 5144299 | Telemetry power carrier pulse encoder A telemetry system for use in controlling the operation of sensors configured on a rotating blade of a gas turbine engine includes an oscillator for generating a power carrier signal. A mechanism is included for providing command signals that select a mod... | 09/01/1992 |
| 5028890 | Voltage driven microwave amplitude modulation system A microwave amplitude modulation system maintains constant amplitude attenuation at very high modulation rates over a broad range of microwave frequencies in response to voltage driving signals derived from modulation signals. In the system, the video inp... | 07/02/1991 |
| 4954791 | Non-commensurate line length rf modulator In a reflective shunt-diode radio-frequency modulator the shunting diodes are spaces so that the transmission line sections between diode pairs have non-commensurate lengths. The transmission line length sections between diode pairs are selected so that a... | 09/04/1990 |
| 4870374 | Modulator producing phase modulation by combining amplitude modulated signals A system is described for using the modulation of the phase of a RF carrier as means of transmitting information. The RF input is split into four quadrature components each of which is passed through individual amplitude control attenuators and then summe... | 09/26/1989 |
| 4140982 | Transistor microstrip oscillator and diode attenuator modulator An RF oscillator and modulator especially useful for UHF applications. The oscillator may comprise a series-tuned Colpitts circuit with the tuned circuit including microstrip transmission lines as impedance elements. The modulator includes a pair of seria... | 02/20/1979 |
| 4047127 | RF oscillator and modulator having regulated low harmonic output An RF oscillator and modulator produces a stable moudlated RF signal with a varying voltage source and without the requirement for critical device selection. A bias voltage for the oscillator transistor is provided by diode means at the oscillator output,... | 09/06/1977 |
