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DUAL ULTRASONIC SENSORS EMPLOYING DIFFERING MODES OF ULTRASONIC TRANSMISSION
US 3,540,265 A
Filed
: 05/21/1968
Issued
: 11/17/1970
Est. Priority Date
: 05/21/1968
Status: Expired due to Term
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Current Assignee
Lawrence C. Lynnworth
Original Assignee
Lawrence C. Lynnworth
Inventors
Lynnworth, Lawrence C.
Application Number
US04/730,872
Time in Patent Office
910 Days
Field of Search
US Class Current
73/627
CPC Class Codes
G01N 2291/0426
Bulk waves, e.g. quartz cry...
G01N 29/11
by measuring attenuation of...
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