H01J17/50 - CPC Classification Index

ClassID:

204782 ⎘

H01J17/50 - CPC Classification

Classification description:

Gas-filled discharge tubes with solid cathode Thermionic-cathode tubes

Sub-classes:

H01J17/52 » with one cathode and one anode 0
H01J17/58 » with more than one cathode or anode 0