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Noise reduction system
US 2,972,018 A
Filed
: 11/30/1953
Issued
: 02/14/1961
Est. Priority Date
: 11/30/1953
Status: Expired due to Term
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Current Assignee
Elvin D. Simshauser
,
Mones E. Hawley
Original Assignee
Elvin D. Simshauser
,
Mones E. Hawley
Inventors
Hawley, Mones E.
,
Simshauser, Elvin D.
Application Number
US03/394,918
Time in Patent Office
2,633 Days
Field of Search
US Class Current
381/71.6
CPC Class Codes
A61F 11/145
electric, e.g. for active n...
H04R 3/002
Damping circuit arrangement...
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