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Class Information
Number: 340/305
Name: Communications: electrical > Systems > Signal box type (e.g., to call messenger, plural fire alarm boxes) > Local circuit to actuate box
Description: Subject matter in which the signal box is actuated by a local circuit separate from the main circuit.


Sub-classes under this class:

Class Number Class Name Patents
340/306 Watchman's local circuit 18


Patents under this class:

Patent Number Title Of Patent Date Issued
6097279 Retractable tamper resistant annunciator Aug. 1, 2000
5760678 Manual modular pull station Jun. 2, 1998
4551707 Fire alarm pull station Nov. 5, 1985
4296408 Location transmitting system Oct. 20, 1981
 
 
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