Radio Direction

# Status Description
2001237559 Lapsed Multi-segmented dielectric resonator antenna
2004204208 Lapsed Radio signal direction finder
1993041274 Lapsed Taxi passenger signal receiver
1987071591 Ceased Radio-direction-finding
1987074074 Ceased Radio direction-finding using time of arrival measurements
2006241268 Ceased Method and system for calibration of a radio direction finder
1998094885 Lapsed Practical space-time radio method for CDMA communication capacity enhancement
2004224912 Lapsed Electronic warfare target simulator
1974074902 RADIO DIRECTION FINDING EQUIPMENT
1976015697 RADIO DIRECTION FINDERS
1977031135 Expired Radio direction finding
1991082003 A radio direction finding system
1998095146 Lapsed Method of determining the direction of arrival of a radio signal in a radio communications system
1999031492 Lapsed Method of improving radio connection quality
2016287195 Filed Radio relay
1989032597 Ceased Antenna apparatus and attitude control method
1999044709 Expired Method of adapting the air interface in a mobile radio system and corresponding base transceiver station, mobile station and transmission mode
1990068551 Ceased Antenna arrangement system capable of reducing co-channel interference
1997017869 Ceased Vehicle identification system for electric toll collection system
1989029443 Ceased Radio antennas