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Class Information
Number:
968/851
Name:
Horology
> Apparatus for measuring unknown time intervals by means not provided for in subclass 817 to subclass 844 [g04f 13/00]
Description:
Sub-classes under this class:
Class Number
Class Name
Patents
968/855
Using electrochemical means [g04f 13/04]
4
968/856
Using fluidic means [g04f 13/06]
1
968/852
Using optical means [g04f 13/02]
5
Patents under this class:
Patent Number
Title Of Patent
Date Issued
4350675
Controlled release glass
Sep. 21, 1982
4298115
Time-lapse indicator
Nov. 3, 1981
4212153
Time color indicator
Jul. 15, 1980
4195057
Vapor-phase moving-boundary indicator
Mar. 25, 1980
4195058
Vapor permeation time-temperature indicator
Mar. 25, 1980
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