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3867836
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Information
Patent Grant
3867836
References
Source
Patent Number
3,867,836
Date Filed
Not available
Date Issued
Tuesday, February 25, 1975
49 years ago
CPC
G01N29/12 - by measuring frequency or resonance of acoustic waves
G01N2291/104 - two or more emitters, one receiver
US Classifications
073 - Measuring and testing
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