US PATENT SUBCLASS 33 / 285
.~ Horizontal angle measurer

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
285.~ Horizontal angle measurer

DEFINITION

Classification: 33/285

(under subclass 227) Device for measuring an angle in the plane of or parallel to the horizon.