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Patent classifications
G
PHYSICS
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G04
HOROLOGY
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G04B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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49/00
Time-pieces using the position of the sun, moon or stars
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G04B49/02
Sundials
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G04B49/04
Graduation or shaping of dials
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