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Title:
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United States Patent 1700977
Inventors:
Butler, Henry E.
Publication Date:
02/05/1929
View Patent Images:
Download PDF 1700977
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Assignee:
Dudley, Diggs M.
Primary Class:
40/666
Other Classes:
24/561, D19/86, D19/65, 24/DIG.028
International Classes:
B42F1/06
;
B42F1/00