Patent Classification Explorer PCE

DIFF Main Group

G03B 13/00

Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras

Introduced: September 1968

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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G03B 13/02 Viewfinders IPC+CPC Available in IPC and CPC
G03B 13/18 Focusing aids IPC+CPC Available in IPC and CPC
G03B 13/32 Means for focusing since 1990 IPC+CPC Available in IPC and CPC