DIFF Subgroup
G03B 13/34 Power focusing
Introduced: January 1990
Full Title
Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras > Means for focusing > Power focusing
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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