US PATENT SUBCLASS 342 / 409
.~.~.~.~ With superimposed images

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}
385  DF  .~ Beacon or receiver {2}
386  DF  .~.~ With transmisson of bearing or position determinative signals {6}
407  DF  .~.~.~ Fixed course or bearing indicating {5}
409.~.~.~.~ With superimposed images

DEFINITION

Classification: 342/409

With superimposed images:

(under subclass 407) Subject matter wherein superposition of two or more visual images is presented within the field of view of an aircraft pilot as an aid to landing or navigation.

(1) Note. Included are systems which superimpose either a facsimile image of a landing area, or flight path marked images, upon a screen so as to be viewed simultaneously with the "real world" by the aircraft pilot.