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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G01D9/02
Producing one or more recordings of the values of a single variable
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G01D9/04
with provision for multiple or alternative recording
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G01D9/06
Multiple recording, e.g. duplicating
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