US PATENT SUBCLASS 340 / 947
.~ Land-based landing guidance

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

945  DF  AIRCRAFT ALARM OR INDICATING SYSTEMS {11}
947.~ Land-based landing guidance {5}
948  DF  .~.~> Aircraft actuation of land-based landing guides
949  DF  .~.~> Wind direction
950  DF  .~.~> Movable (e.g., rotatable) guides
951  DF  .~.~> Phased landing guidance (e.g., runway approach, landing, touchdown)
952  DF  .~.~> Particular energy guide source (e.g., sound, electric field, radio) {2}

DEFINITION

Classification: 340/947

Land-based landing guidance:

(under subclass 945) Subject matter having means in the immediate vacinity of a landing field to guide the aircraft in its descent to the landing field.

SEE OR SEARCH THIS CLASS, SUBCLASS:

985, for similar systems when used to guide watercraft.

SEE OR SEARCH CLASS

244, Aeronautics,

114, for landing field arrangements of nonelectrical design.