Matches 151 - 200 out of 203 < 1 2 3 4 5 >
Match Document Document Title
3967264 Distribution network power line communication system including addressable interrogation and response repeater  
A distribution network power line communication system which is divided into addressable communication zones defined by repeaters located at the distribution transformers of the distribution...
3941948 Four-wire interface regulator for long distance trunk circuits  
A four-wire interface regulator for long distance trunk circuits is provided in which the interface regulator separates the components of a conventional local plant output signal to change the...
3939417 Emergency communications system  
A control console including a transceiver, a plurality of terminal stations positioned at spaced apart locations remote from the console and each including a transceiver connected to the console by...
3781684 SINGLE-ANTENNA REPEATER SYSTEM UTILIZING HYBRID TRANSFORMERS  
One embodiment of this repeater comprises a multicoupler comprising three brid transformers for coupling a pair of transceivers to a single antenna, which may be simultaneously used without...
3571512 INTERRUPT CIRCUIT FOR USE IN A DUPLEX CONTROL CIRCUIT  
The interrupt circuit is combined with a half-duplex repeater having a duplex control circuit. When an interrupt signal is received, the interrupt circuit, after the passage of a predetermined...
3496308 LEVEL CONTROL FOR SUBSCRIBER CARRIER SYSTEM  
3487310 COMMUNICATION TRANSPONDER TECHNIQUE  
3193775 Adjustable attenuation equalizer  
3175216 Communication station employing antenna array  
3170994 Tone operated echo suppressor control circuit  
3145269 Control of dynamic range and sensitivity of echo suppressor circuits  
3128353 Transmission control in signaling system  
3105125 Power separation filter  
3048840 Communication system  
3040130 Repeater station for a bidirectional communication system  
2994870 Communications links  
2989744 False echo transmitter  
2938202 Distance measuring apparatus  
2907874 Microwave communication system  
2871294 Automatic frequency correction in two-way carrier communication systems  
2791683 Radio relay system  
2786996 Wave measuring system  
2699496 Microwave relay test system  
2666845 Two-way communication system  
2635233 Multiplex radiophone communication system  
2627021 Airborne transoceanic radio relay system  
2577731 High-frequency traffic system over power supply lines  
2561212 Microwave hybrid branching systems  
2514367 Fault locating for radio relay systems  
2510461 Multistation microwave communication system  
2510066 Vehicle communication system  
2509218 Repeater link system  
2475474 Radio communication system  
2471416 Radio communicating system  
2442815 Radio carrier telephone system  
2379055 Signal wave transmission system  
2375223 Dielectric guide signaling  
2345951 Radio relay control system  
2250532 Radio relaying system  
2248250 Single side-band modulation  
2229078 Radio relaying system  
2146301 Radio relay system  
2106806 Relay system  
1997706 Multiple radiotelephone and telegraph circuit  
1698777 Radiorepeater  
1668270 Radiosignaling  
1642710 Pilot-channel-indicating system  
1624966 Title is not available  
1605972 Title is not available  
1554188 High-frequency multiplex-signaling system  
Matches 151 - 200 out of 203 < 1 2 3 4 5 >