US PATENT SUBCLASS 359 / 836
.~.~.~ Roof or roof-angle

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

831  DF  PRISM (INCLUDING MOUNT) {3}
833  DF  .~ With reflecting surface {1}
834  DF  .~.~ Plural reflecting surfaces {2}
836.~.~.~ Roof or roof-angle

DEFINITION

Classification: 359/836

Roof or roof-angle:

(under subclass 834) Subject matter comprising surfaces that revert and invert the image and, at the same time, will deviate the line of sight through a 90 deg. angle.