Title:
Latch operated microphone switch for breathing mask
United States Patent 3347229


Inventors:
Heitman, David L.
Application Number:
US43447865A
Publication Date:
10/17/1967
Filing Date:
02/23/1965
Assignee:
SIERRA ENG CO
Primary Class:
Other Classes:
128/206.27, 128/207.11, 379/430
International Classes:
A62B18/08
View Patent Images:
US Patent References:
3234940Retention for quick donning mask1966-02-15
2814293Respiratory masks1957-11-26
1780178Telephone head set1930-11-04
0535540N/A1895-03-12