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Class Information
Number: 330/49
Name: Amplifiers > With vacuum tube having distributed parameter impedance characteristics
Description: Subject matter wherein the amplifying device is of the vacuum tube type and includes within the vacuum tube an electrode or other element having distributed parameter impedance characteristics.

Patents under this class:

Patent Number Title Of Patent Date Issued
8335326 Communication method for vacuum tube replacement devices Dec. 18, 2012
7482863 Expanded performance and functions for vacuum tube replacement devices Jan. 27, 2009
7408401 Vacuum tube replacement device, circuit and system Aug. 5, 2008
7355475 Output circuit of vacuum-tube amplifier Apr. 8, 2008
6895096 Microchannel plate audio amplifier May. 17, 2005
4967162 Stripline traveling wave device and method Oct. 30, 1990
4119921 Amplifier device for transmitting tetrode Oct. 10, 1978
3950710 Wide band, in-line, microwave amplifier Apr. 13, 1976

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