Title:
Cartridge for breathing apparatus
United States Patent 1802941

Inventors:
Elfriede, Drager
Publication Date:
04/28/1931
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Assignee:
Heinrich, Otto Drager
Primary Class:
96/131
Other Classes:
55/DIG.031, 55/489, 55/517, 55/521
International Classes:
A62B19/00