DIFF Subgroup
H03M 11/02 Details
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys > Details
CPC:
Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys (keyboard switch arrangements, structural association of coders and keyboards H01H13/70, H03K17/94) > Details
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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