Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01D
MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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3/00
Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
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G01D3/028
mitigating undesired influences, e.g. temperature, pressure
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G01D3/036
on measuring arrangements themselves
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