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United States Patent 2047090
Inventors:
Woolfson, Walter M.
Publication Date:
07/07/1936
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Download PDF 2047090
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Assignee:
Woolfson, Walter M.
Primary Class:
217/7
Other Classes:
206/233, 206/804, 206/254, 206/236, 206/223, 206/237, 221/95
International Classes:
B65D81/22
;
B65D81/18