Title:
SURGICAL MASK
United States Patent 3490447
US Patent References:
/0535718.html
- - 0535718

Surgical mask
- - 2227667

Respiratory mask
- - 2281181


Inventors:
Jackson, Richard Robert
Publication Date:
01/20/1970
View Patent Images:
Download PDF 3490447 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Richard, Robert Jackson
Primary Class:
128/863
Other Classes:
128/206.220, D24/110.100
International Classes:
A41D13/11; A41D13/05; A61B19/00; A62B23/06




<- Previous Patent (CONTRACEPTIVE)   |   Next Patent (ADHESIVE PRESSURE PA...) ->