CPC Subgroup
E06B 7/30 Peep-holes; Devices for speaking through; Doors having windows
Full Title
Special arrangements or measures in connection with doors or windows ( ; screening or similar protective devices E06B9/00) > Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners > Peep-holes; Devices for speaking through; Doors having windows
1 direct subcode
Child Classifications
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