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Class Information
Number:
968/845
Name:
Horology
>
Apparatus for measuring unknown time intervals by electric means (timing devices for clocks or watches for comparing the rate of the oscillating member with a standard subclass 769; radar systems, analogous systems g01s 9/00; measuring frequency g01r 23/00; measuring phase angle g01r 25/00) [g04f 10/00]
> Using oscillators with passive electric resonator, e.g., lumped lc, etc. (subclasses 846, 847, and 849 take precedence) [g04f 10/02]
Description:
Patents under this class:
Patent Number
Title Of Patent
Date Issued
4211066
Stop watch
Jul. 8, 1980
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