Closable counter device for vertical wall

Details Closable counter device for vertical wall Closable counter device for vertical wall

1975-02-11

1977-01-11

Downey, Kenneth

Movable or removable closures

Mounted for optional movements

One closure movable separately from or with other closure

E06B 728

Patent

active

040019705

ABSTRACT:
This invention relates to a closable counter device for a vertical wall structure such as a door of a house or an office or room in a building and more particularly to a closable counter device on a vertical wall such as a door adapted to conveniently communicate with a visitor or visitors or to deliver an article or articles therethrough in the condition of opening the counter device while the door is latched without imparting any discomfort to the visitor or visitors and in a safe manner in connection with prevention of crimes as well as in connection with prevention of privacy.

REFERENCES:
patent: 1576656 (1926-03-01), Honsinger

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