using cathode ray tubes (H04N9/11 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: using cathode ray tubes

CPC: using cathode ray tubes (H04N9/11 takes precedence)

Full titles differ between systems:

IPC:

Details of colour television systems > Picture reproducers > using cathode ray tubes

CPC:

Details of colour television systems > Picture reproducers (H04N9/11 takes precedence) > using cathode ray tubes (H04N9/11 takes precedence)

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

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H04N 9/18 using separate electron beams for the primary colour signals (H04N9/27 takes precedence) IPC+CPC Available in IPC and CPC
H04N 9/22 using the same beam for more than one primary colour information (H04N9/27 takes precedence) IPC+CPC Available in IPC and CPC
H04N 9/27 with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons since 1974 IPC+CPC Available in IPC and CPC
H04N 9/28 Arrangements for convergence or focusing IPC+CPC Available in IPC and CPC
H04N 9/29 using demagnetisation or compensation of external magnetic fields since 1974 IPC+CPC Available in IPC and CPC

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

Class H04,2013–2023, worldwide · Source: EPO PATSTAT