Auxiliary door device for entrance

The present invention provides an auxiliary door device for a front door to stably exchange articles in noncontact and untact states between people positioned indoors and outdoors by forming a placing space in which articles are placed when opened. The auxiliary door device for a front door is insta...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	CHO, JA RYONG
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL FIXED CONSTRUCTIONS FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES LADDERS
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