US PATENT SUBCLASS 434 / 241
.~ Simulation of upwardly directed airfield or landing approach marker radio beam

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

239  DF  RADIO NAVIGATION {5}
241.~ Simulation of upwardly directed airfield or landing approach marker radio beam

DEFINITION

Classification: 434/241

Simulation of upwardly directed airfield or landing approach marker radio beam:

(under subclass 239) Subject matter including an imitation of a vertically directed radio beam used to designate the location of an airport or the path to be followed by an aircraft landing thereon.