Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01K
MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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3/00
Thermometers giving results other than momentary value of temperature
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G01K3/08
giving differences of values; giving differentiated values
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G01K3/10
in respect of time, e.g. reacting only to a quick change of temperature
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G01K3/12
based upon expansion or contraction of materials
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