Networks using digital techniques

Introduced: January 1980

CPC subdivides this area 4x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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H03H 17/0009 +1 CPC CPC only CPC only
H03H 17/0045 CPC only CPC only
H03H 17/0054 CPC only CPC only
H03H 17/0063 CPC only CPC only
H03H 17/02 Frequency selective networks since 1980 +9 CPC IPC+CPC Available in IPC and CPC
H03H 17/08 Networks for phase shifting since 1980 IPC+CPC Available in IPC and CPC
H03H 2017/0072 2nd only +2 CPC CPC only CPC only

Class H03,2013–2023, worldwide · Source: EPO PATSTAT

Class H03,2013–2023, worldwide · Source: EPO PATSTAT