Title:
Respirator
United States Patent 1695170
Inventors:
Laurence, Burdick Charles
Publication Date:
12/11/1928
Export Citation:
Click for automatic bibliography generation
Assignee:
Laurence, Burdick Charles
Primary Class:
128/207.12
Other Classes:
55/DIG.35
International Classes:
A62B18/00; A62B18/00
View Patent Images:
Download PDF 1695170        PDF help