Self-contained breathing apparatus
United States Patent 1532654

Inventors:
Bernhard, Drager Alexander
Publication Date:
04/07/1925
View Patent Images:
Download PDF 1532654 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Bernhard, Drager Alexander
Primary Class:
128/205.160
Other Classes:
318/828
International Classes:
A62B7/10