US PATENT SUBCLASS 33 / 271
.~.~.~.~ And compass

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

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
268  DF  .~ Celestial {1}
269  DF  .~.~ Time computing {1}
270  DF  .~.~.~ Including gnomonic indicator (e.g., sundial, etc.) {1}
271.~.~.~.~ And compass

DEFINITION

Classification: 33/271

(under subclass 270) Device including means responsive to an

external magnetic field, usually that of the earth, for indicating direction.