Hollow metal door construction
United States Patent 2664181
US Patent References:
/RE21024.html
- - RE21024

/0963450.html
- - 0963450

/1039292.html
- - 1039292

/1323753.html
- - 1323753

Metal door
- - 1748195


Inventors:
Earl, Boughton
Publication Date:
12/29/1953
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Assignee:
Earl, Boughton
Primary Class:
49/503
Other Classes:
70/451, 292/337
International Classes:
E06B3/82; E06B3/70
US Patent References:
1822251Door and doorway
2013412Door construction
Foreign References:
GB376814A
GB471258A