Patent classifications
G
PHYSICS
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G04
HOROLOGY
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G04C
ELECTROMECHANICAL CLOCKS OR WATCHES
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23/00
Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
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G04C23/38
Mechanisms measuring a chosen time interval independently of the time of day at which interval starts
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G04C23/42
acting only at the end of a single time interval
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G04C23/46
with provision for adjustment of the interval
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