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Closed circuit breathing apparatus
US 2,852,023 A
Filed
: 11/06/1956
Issued
: 09/16/1958
Est. Priority Date
: 11/06/1956
Status: Expired due to Term
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Current Assignee
Robert M. Bovard
,
William C. Hamilton
Original Assignee
Robert M. Bovard
,
William C. Hamilton
Inventors
Hamilton, William C.
,
Bovard, Robert M.
Application Number
US03/620,686
Time in Patent Office
679 Days
Field of Search
US Class Current
128/205.12
CPC Class Codes
A61M 16/00
Devices for influencing the...
A62B 7/10
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