TREA

Vacuum tubes

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Industry

  • CPC
  • H01J21/00
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

HELECTRICITY H01Electric elements H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Current Industry

H01J21/00Vacuum tubes

Sub Industries

H01J21/02Tubes with a single discharge path H01J21/04without control means H01J21/06having electrostatic control means only H01J21/065Devices for short wave tubes H01J21/08with movable electrode or electrodes H01J21/10with one or more immovable internal control electrodes H01J21/105with micro-engineered cathode and control electrodes H01J21/12Tubes with variable amplification factor H01J21/14Tubes with means for concentrating the electron stream H01J21/16with external electrostatic control means and with or without internal control electrodes H01J21/18having magnetic control means having both magnetic and electro-static control means H01J21/20Tubes with more than one discharge path Multiple tubes H01J21/22with movable electrode or electrodes H01J21/24with variable amplification factor H01J21/26with means for concentrating the electron stream H01J21/34Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect H01J21/36Tubes with flat electrodes
Industries