Adjustable door frame
United States Patent 1775720

Inventors:
Grable, Hugh R.
Publication Date:
09/16/1930
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Assignee:
Grable, Hugh R.
Primary Class:
52/211
Other Classes:
49/505, 109/77, 52/217, 52/712
International Classes:
B66B13/30; E06B1/20; E06B1/12