Title:
Window frame construction
United States Patent 2717667
US Patent References:
/1028761.html
- - 1028761

Joining lengths of metal
- - 2101349


Inventors:
Bancroft, Joseph C.
Publication Date:
09/13/1955
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Assignee:
Bancroft, Joseph C.
Primary Class:
49/503
Other Classes:
160/381, 403/295
International Classes:
E06B3/972; E06B3/96
Foreign References:
IT439603B
DE872847C