Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 330/206
Name: Amplifiers > With power or bias voltage supply > For filamentary cathode
Description: Subject matter which may include the heater current supply for a filamentary cathode of a vacuum tube amplifying device not classified in any preceding subclass.

Patents under this class:

Patent Number Title Of Patent Date Issued
6194774 Inductor including bonding wires Feb. 27, 2001
4324950 Amplifier for driving electrostatic loudspeakers Apr. 13, 1982
4290027 Fail-safe active bandpass filter using a modified twin-T filter Sep. 15, 1981

  Recently Added Patents
Performance apparatus, a method of controlling the performance apparatus and a program recording medium
Curable inks comprising surfactant-coated magnetic nanoparticles
Thermally efficient busway
Push-up bar
Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities
Dithering method and apparatus
Housing for gas flow indicator
  Randomly Featured Patents
2,3-Dihydro-2-aminobenzofuran-5-yl sulfonates
Increasing the recoverability of gold from carbonaceous gold-bearing ores
Toner cartridge having separable parts and recording apparatus with toner cartridge
Biofeedback ring sensors
Modular self-programmer
Coating compositions comprising pharmaceutical agents
Tethered pair liquid feeder/toy set
Defect inspection method and defect inspection apparatus
Wireless soil moisture meter network
Flying platform