Title:
RESPIRATOR WITH IMPROVED EXHALATION VALVE AND CONTROL MEANS
United States Patent 3485243


Inventors:
Bird, Forrest M.
Pohndorf, Henry L.
Application Number:
US3485243DA
Publication Date:
12/23/1969
Filing Date:
08/02/1965
Assignee:
Bird F. M.
Pohndorf, Henry L.
Primary Class:
Other Classes:
128/205.24, 137/114
International Classes:
A61M16/00; (IPC1-7): A62B7/00; F04F5/24; A61M16/00
View Patent Images:
US Patent References:
3373688Pumps1968-03-19
Foreign References:
DE24966C
DE309595C