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Electronic sound absorber
US 2,983,790 A
Filed
: 04/30/1953
Issued
: 05/09/1961
Est. Priority Date
: 04/30/1953
Status: Expired due to Term
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Current Assignee
Harry F. Olson
Original Assignee
Harry F. Olson
Inventors
Olson, Harry F.
Application Number
US03/352,197
Time in Patent Office
2,931 Days
Field of Search
US Class Current
381/71.1
CPC Class Codes
G10K 11/17857
Geometric disposition, e.g....
G10K 11/17861
using additional means for ...
G10K 11/17873
using a reference signal wi...
G10K 2210/128
Vehicles
G10K 2210/3011
Single acoustic input
G10K 2210/3217
Collocated sensor and cance...
G10K 2210/3221
Headrests, seats or the lik...
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