Title:
Breathing apparatus
United States Patent 2325049

Inventors:
Frye, Henry H.
Behnke, Albert R.
Publication Date:
07/27/1943
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Assignee:
Frye, Henry H.
Behnke, Albert R.
Primary Class:
128/204.170
Other Classes:
128/205.120, 128/204.250
International Classes:
A62B7/10