Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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17/00
Measuring arrangements involving comparison with a reference value, e.g. bridge
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G01R17/10
AC or DC measuring bridges
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G01R17/16
with discharge tubes or semiconductor devices in one or more arms of the bridge, e.g. voltmeter using a difference amplifier
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