G02B 23/145 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

G02B 23/145

Full Title

Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices > Viewfinders (for photographic apparatus G03B13/02)

This code exists only in CPC.

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