Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 330/193
Name: Amplifiers > Output networks > From cathode
Description: Subject matter, wherein the output signal is coupled from the cathode electrode of a vacuum tube amplifying device.

Sub-classes under this class:

Class Number Class Name Patents
330/194 D.c. coupled 0

Patents under this class:

Patent Number Title Of Patent Date Issued
7583141 Output circuit of vacuum-tube amplifier Sep. 1, 2009
7583140 Output circuit of vacuum-tube amplifier Sep. 1, 2009

  Recently Added Patents
Polyureas made from aminocrotonates and enaminones
Medicament container
Heating pad
2-aryl-4-quinazolinones and their pharmaceutical compositions
Primed stem cells and uses thereof to treat inflammatory conditions in joints
Variable month cross-platform photo calendar builder
Data transfer operation completion detection circuit and semiconductor memory device provided therewith
  Randomly Featured Patents
Submersible pump locking system
Surface-active polysiloxanes
Methods and apparatus for controlling flare in roll-forming processes
Hyperbranched copolymer comprising monomers of choice, a composition, and a cosmetic method
Semiconductor device and method of producing the same
Envelope with sealed display rack hole
Method and chimney for reducing the emission of solid particles
Proteins with improved solubility and methods for producing and using same
Role-playing game
System for supporting a multiplicity of copy features