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Respirators
US 2,780,222 A
Filed
: 12/18/1953
Issued
: 02/05/1957
Est. Priority Date
: 12/18/1953
Status: Expired due to Term
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126
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Current Assignee
Fred E. Fowler
,
John A. Geer
,
Marvin H. Polzin
Original Assignee
Fred E. Fowler
,
John A. Geer
,
Marvin H. Polzin
Inventors
Polzin, Marvin H.
,
Geer, John A.
,
Fowler, Fred E.
Application Number
US03/398,986
Time in Patent Office
1,145 Days
Field of Search
US Class Current
601/44
CPC Class Codes
A61H 2031/025
using the same pump for pre...
A61H 31/02
"Iron-lungs" , i.e. involvi...
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