US PATENT SUBCLASS 434 / 239
RADIO NAVIGATION

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

239RADIO NAVIGATION {5}
240  DF  .~> Light sensor included in simulator of radio navigation equipment
241  DF  .~> Simulation of upwardly directed airfield or landing approach marker radio beam
242  DF  .~> Simulated radio signal generated by use of data storage means
243  DF  .~> Simulated bearing or position or vehicle relative to radio transmitter or directional beam indicated to trainee by instrument
244  DF  .~> Simulation of radio directional beam carrying Morse code signal

DEFINITION

Classification: 434/239

RADIO NAVIGATION:

(under the class definition) Subject matter relating to teaching or demonstrating the operation or characteristics of a means for determining position, course, or distance traveled by use of radio waves.

(1) Note. Instruction can be done by any means, actual or simulated, however, when using actual means the input signal representing position, course, or distance is a simulated signal.

SEE OR SEARCH CLASS

343, Communications: Radio Wave Antennas,

385+, for radio wave energy directive beacons for guiding aircraft along a course or on a glide path in landing operations; and subclasses 417+ for direction finding receivers.

346, Recorders,

8, for recorders responsive to the direction and/or extent of motion of a translating member or vehicle.

701, Data Processing: Vehicles, Navigation, and Relative Location, 200, for electrical navigation equipment.