DIFF Subgroup
H01P 1/213 combining or separating two or more different frequencies (H01P1/215 takes precedence)
Introduced: January 1980
Title
Titles differ between systems:
IPC: combining or separating two or more different frequencies
CPC: combining or separating two or more different frequencies (H01P1/215 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Auxiliary devices > Frequency-selective devices, e.g. filters > combining or separating two or more different frequencies
CPC:
Auxiliary devices (coupling devices of the waveguide type H01P5/00) > Frequency-selective devices, e.g. filters > combining or separating two or more different frequencies (H01P1/215 takes precedence)
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open