US PATENT SUBCLASS 33 / 270
.~.~.~ Including gnomonic indicator (e.g., sundial, etc.)

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.~.~.~ Including gnomonic indicator (e.g., sundial, etc.) {1}
271  DF  .~.~.~.~> And compass

DEFINITION

Classification: 33/270

(under subclass 269) Device including an element which by the position or length of its shadow cast upon a dial or surface indicates the time of day.