Title:
Filter mask facelet
United States Patent 3315674


Inventors:
Aaron, Bloom
Olt, John D.
Application Number:
US42143564A
Publication Date:
04/25/1967
Filing Date:
12/28/1964
Assignee:
SIERRA ENGINEERING COMPANY
Primary Class:
Other Classes:
128/206.12, 128/207.11, D24/110.4
International Classes:
A62B18/08
View Patent Images:
US Patent References:
3220409Face mask1965-11-30
3169171Disposable sanitary cover for telephones1965-02-09
2997550Microphone mask1961-08-22
2681060Dust mask1954-06-15