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Class Information
Number: 330/186
Name: Amplifiers > Input networks > To cathode
Description: Subject matter wherein the input signal is coupled to the cathode of a vacuum tube amplifying device.

Sub-classes under this class:

Class Number Class Name Patents
330/187 D.c. coupled 1

Patents under this class:

Patent Number Title Of Patent Date Issued
8105928 Graphene based switching device having a tunable bandgap Jan. 31, 2012
4471316 Electric oscillation generator Sep. 11, 1984

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