US PATENT SUBCLASS 368 / 15
ASTRONOMICAL

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

15ASTRONOMICAL {5}
16  DF  .~> With sun, earth, and moon display
17  DF  .~> With sun and earth display
18  DF  .~> With moon and earth display
19  DF  .~> With tide display
20  DF  .~> With navigational display

DEFINITION

Classification: 368/15

ASTRONOMICAL:

(under the class definition) Subject matter incorporating means for indicating celestial body data (e.g., tide occurrences, moon phases, etc.).

(1) Note. Sundials and like instruments which measure time by the position of a shadow are classified in Class 33.

SEE OR SEARCH CLASS

33, Geometrical Instruments,

268+, for straight-line light ray-type celestial instruments with time indicators.