US PATENT SUBCLASS 169 / 23
ALARMS
Current as of: June, 1999
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DEFINITION
Classification: 169/23
(under the class definition) Alarm or signal devices peculiarly adapted for use in connection with extinguishing systems for signaling the abnormal position of a valve or abnormal flow through the pipes.
SEE OR SEARCH CLASS
116, Signals and Indicators,
227,.
340, Communications: Electrical,
577, 599 for electric fire alarm systems which are automatically responsive to fire or temperature. See the class definition of Class 340 for the line between Classes 169 and 340.
