CPC Subgroup
G01K 11/22 using measurement of acoustic effects
Full Title
Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 > using measurement of acoustic effects
2 direct subcodes
Child Classifications
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- G01K 11/24 of the velocity of propagation of sound
- G01K 11/26 of resonant frequencies