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Class Information
Number: 379/319
Name: Telephonic communications > Centralized switching system > Single switchboard (e.g., cord circuit)
Description: Subject matter including structure or circuitry of a manual line switching apparatus actuated by a single operator.


Sub-classes under this class:

Class Number Class Name Patents
379/320 Switchboard circuit 3


Patents under this class:

Patent Number Title Of Patent Date Issued
6333981 Shelf driver unit and method Dec. 25, 2001
4354058 Portable field control unit for emergency telephone communications Oct. 12, 1982
4252998 Identifier for manual switchboards with conference facility Feb. 24, 1981
 
 
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