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United States Patent 2414405

Inventors:
Bierman, Howard R.
Beckwith, George E.
Publication Date:
01/14/1947
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Assignee:
Bierman, Howard R.
Beckwith, George E.
Primary Class:
128/201.190
Other Classes:
128/201.230
International Classes:
A62B18/08; A62B18/00
Other References:
None