Electrodes; Screens; Mounting, supporting, spacing or insulating thereof

Introduced: September 1968

Title

Titles differ between systems:

IPC: Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof

CPC: Electrodes; Screens; Mounting, supporting, spacing or insulating thereof

Full Title

Full titles differ between systems:

IPC:

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group > Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof

CPC:

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00 > Electrodes; Screens; Mounting, supporting, spacing or insulating thereof

CPC subdivides this area 2x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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H01J 29/021 CPC only CPC only
H01J 29/023 CPC only CPC only
H01J 29/025 CPC only CPC only
H01J 29/026 CPC only CPC only
H01J 29/028 CPC only CPC only
H01J 29/04 Cathodes IPC+CPC Available in IPC and CPC
H01J 29/06 Screens for shielding; Masks interposed in the electron stream IPC+CPC Available in IPC and CPC
H01J 29/08 Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted or stored, e.g. backing-plates for storage tubes or collecting secondary electrons +1 CPC IPC+CPC Available in IPC and CPC
H01J 29/10 Screens on or from which an image or pattern is formed, picked up, converted or stored IPC+CPC Available in IPC and CPC