Title:
Mask
United States Patent 1632449

Inventors:
Mckessson, Elmer I.
Publication Date:
06/14/1927
View Patent Images:
Download PDF 1632449 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Mckessson, Elmer I.
Primary Class:
128/206.240
Other Classes:
128/207.130
International Classes:
A62B18/02; A62B18/00