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Title:
Drain channel and trough for storage shelters
United States Patent 2833228
Inventors:
Martin, Joseph E.
Publication Date:
05/06/1958
Assignee:
Martin, Joseph E.
Primary Class:
Other Classes:
52/86, 52/143, 52/519, 52/522, 52/643, 52/644
International Classes:
E04B1/343
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US Patent References:
Foreign References:
DE566844C
NL39732C