73135162
Jul 25, 1977
Feb 21, 1978
SCIENTIFIC INSTRUMENTS AND APPARATUS FOR USE IN CONNECTION WITH NAVIGATION, SURVEYS AND POSITION-FIXING-NAMELY, RADIO RECEIVERS, NAVIGATION TIMING RECEIVERS, NAVIGATION TIMING UNITS, TRANSMITTER CONTROL UNITS, POWER SUPPLY UNITS, TRANSMITTERS, OUTPUT COUPLING UNITS, ANTENNAE TUNING UNITS, ANTENNAE, AND PARTS THEREFOR
Electrical and Scientific Apparatus