Title:
Door and frame constructions
United States Patent 3396490
US Patent References:
/1099415.html
- - 1099415

Double-hinged door
- - 2796628

Door closer
- - 2908050

Metal door structure
- - 2948366

Door control mechanism
- - 3091819


Inventors:
John, Dukas
Publication Date:
08/13/1968
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Primary Class:
49/382
Other Classes:
49/388, 49/394
International Classes:
E06B3/72
Foreign References:
FR742089A