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Face mask
US 2,625,155 A
Filed
: 12/11/1950
Issued
: 01/13/1953
Est. Priority Date
: 12/11/1950
Status: Expired due to Term
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Current Assignee
Arthur E. Engelder
Original Assignee
Arthur E. Engelder
Inventors
Engelder, Arthur E.
Application Number
US03/200,250
Time in Patent Office
764 Days
Field of Search
US Class Current
128/206.24
CPC Class Codes
A61M 16/06
Respiratory or anaesthetic ...
A61M 16/0605
Means for improving the ada...
A61M 16/0683
Holding devices therefor
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