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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33/00
Arrangements or instruments for measuring magnetic variables
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G01R33/0023
Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
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G01R33/0041
using feed-back or modulation techniques
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