DIFF Subgroup
H03H 17/04 Recursive filters
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Networks using digital techniques > Frequency-selective networks > Recursive filters
CPC:
Networks using digital techniques > Frequency selective networks > Recursive filters
Of 7 combined children, 0 exist in both systems.
7 codes are CPC-only extensions.
Note: 3 CPC extensions are marked as secondary classification only.
Child Classifications
Navigate with arrow keys, Enter to open