US PATENT SUBCLASS 342 / 450
.~ Position indicating (e.g., triangulation)

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

350  DF  DIRECTIVE {10}
450.~ Position indicating (e.g., triangulation) {11}
451  DF  .~.~> By computer
452  DF  .~.~> By plotting table
453  DF  .~.~> By deflected or repeated signal
454  DF  .~.~> Traffic {2}
457  DF  .~.~> Land vehicle location (e.g., bus, police car
458  DF  .~.~> Distance
459  DF  .~.~> Underground object location
460  DF  .~.~> Storm or atomic explosion location
461  DF  .~.~> With speed determination
462  DF  .~.~> With altitude determination
463  DF  .~.~> Having plural transmitters or receivers {2}

DEFINITION

Classification: 342/450

Position indicating (e.g., triangulation):

(under subclass 350) Subject matter including apparatus for determining the position in space of an object, vehicle or atmospheric condition by the reception of signals not having distinctive bearing or position determinative characteristics.

(1) Note. Usually position is fixed by triangulation using two or more bearing determinations.

SEE OR SEARCH THIS CLASS, SUBCLASS:

357, for position indicating means including a satellite.

358+, for beacons or receivers having means for sending or receiving distinctive directive signals which may be used to determine the position of an object.