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Number:
968/856
Name:
Horology
>
Apparatus for measuring unknown time intervals by means not provided for in subclass 817 to subclass 844 [g04f 13/00]
> Using fluidic means [g04f 13/06]
Description:
Patents under this class:
Patent Number
Title Of Patent
Date Issued
4229813
Elapsed time indicator
Oct. 21, 1980
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