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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G01D7/02
Indicating value of two or more variables simultaneously
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G01D7/08
using a common indicating element for two or more variables
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G01D7/10
giving indication in co-ordinate form
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