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DIFF Subgroup
H01P 1/212

suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: suppressing or attenuating harmonic frequencies

CPC: suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Auxiliary devices > Frequency-selective devices, e.g. filters > suppressing or attenuating harmonic frequencies

CPC:

Auxiliary devices (coupling devices of the waveguide type H01P5/00) > Frequency-selective devices, e.g. filters > suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.