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Acoustic impedance measuring apparatus
US 2,837,914 A
Filed
: 02/24/1954
Issued
: 06/10/1958
Est. Priority Date
: 02/24/1954
Status: Expired due to Term
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Current Assignee
Caldwell, Stephen A.
Original Assignee
Caldwell, Stephen A.
Inventors
Caldwell, Stephen A.
Application Number
US03/412,360
Time in Patent Office
1,567 Days
Field of Search
US Class Current
73/589
CPC Class Codes
G01H 15/00
Measuring mechanical or aco...
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