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| Number | Title | Issue Date |
| 4053854 | Q switching microwave oscillator A housing defining a first cavity forming a transmission line and a negative impedance semiconductor device terminating one end of the transmission line in a negative impedance, the housing further defining a second cavity resonant at a predetermined freq... | 10/11/1977 |
| 4051439 | Short pulse magnetron transmitter A magnetron transmitter having a two-stage modulator, one stage generating long, slowly rising, low power pulse, and the other generating a short, high power pulse, whereby high resolution is obtainable without the use of pulse compression techniques.... | 09/27/1977 |
| 4044308 | Communication transmitting apparatus with carrier level control Low level amplitude modulated radio transmitting apparatus employing a DC control loop from the output amplifier to the audio modulating stage for maintaining the carrier output level constant. The audio signal to be transmitted is superimposed on the DC ... | 08/23/1977 |
| 4042882 | Radio-balloon distress signal A signal for indicating the location of one or more people in distress comprising a rectangular tank containing helium, an inflatable balloon enclosed by a casing of aluminum foil and tubular connections between the tank and the balloon and which include ... | 08/16/1977 |
| 4038602 | Automodulated realtivistic electron beam microwave source A relativistic electron beam device for producing highpower microwave radion. The device comprises an electron beam injection gun, a drift chamber comprising a tube having a plurality of gapped resonant cavities along its length, means for converting the... | 07/26/1977 |
| 4025855 | Multi-channel R.F. transducer with channel selector coupled to selected channel filter A voltage variable filter circuit useful, for example, in a radio frequency transmitting device and having a center frequency which is changeable with changes in an applied voltage employs one or more voltage variable reactive elements in the filter in co... | 05/24/1977 |
| 4013961 | A.M. Signal generator having an r.f. output level control An A.M. signal generator having an r.f. level control arrangement includes a modulator whose output gain is controllable, a detector for detecting the A.M. wave produced by the modulator and means for sampling and storing the output of the detector at tim... | 03/22/1977 |
| 3997843 | Monocycle pulse generator The radio frequency source for a low power, lightweight radar is provided by operating a transistor in the avalanche mode. An open delay line is in the collector circuit and a shorted delay line in shunt with the output line is part of the emitter load. T... | 12/14/1976 |
| 3967217 | Modulator for digital microwave transmitter A microwave modulator especially adapted for use in a digital microwave transmitter and capable of operation over a broad range of data rates and carrier frequencies. The modulator is operative with a multiple level modulation signal having zero average a... | 06/29/1976 |
| 3944946 | Coherent generation of microwaves by stimulated Raman emissions The generation of controlled, electromagnetic, coherent, microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency by means of a source of high energy electrons being directed into a plasma and coupling the resultant ener... | 03/16/1976 |
| 3938080 | System for the programmed flashing of warning lights A system for the programmed flashing of a plurality of highway warning lights includes a plurality of slave receivers each associated with a warning light to be mounted on respective barricades along with one or more master transmitters associated with ce... | 02/10/1976 |
| 3936746 | FM receiver having transmitting function An FM receiver having a signal transmission capability includes an FM signal receiving circuit including a local oscillator and an FM detector for receiving an FM signal and for demodulating the received signal to derive an audio signal therefrom. A frequ... | 02/03/1976 |
| 3934201 | Low power consumption stereo transmitter and receiver system A low power consumption, compact portable stereo radio transmitter and a receiver therefor, the transmitter having two audio processing channels each for receiving inputs from two stereo pickup stations and including amplifier circuits with selector switc... | 01/20/1976 |
