Title:
Fire-proof building construction unit
United States Patent 2718287
US Patent References:
Metal door
- - 1439439

/1848715.html
- - 1848715

Interior wall construction for buildings
- - 2097988

Constructional element
- - 2140709

Door and the like
- - 2297609


Inventors:
Hobart, Ilia E.
Publication Date:
09/20/1955
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Assignee:
Hobart, Ilia E.
Primary Class:
52/784.120
Other Classes:
52/793.110, 52/802.100, 52/794.100
International Classes:
E04B1/94; E06B3/82; E06B5/16; E06B5/10
US Patent References:
2369373Wall unit for sectional buildings
2419149Electrical method of mechanically connecting and mutually insulating spaced metal elements
2451396Metal door and panel construction
2567357Hollow metal door construction