Patent classifications
G
PHYSICS
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G06
COMPUTING OR CALCULATING; COUNTING
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G06K
GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
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7/00
Methods or arrangements for sensing record carriers,; e.g. for reading patterns;
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G06K7/08
by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
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G06K7/082
using inductive or magnetic sensors
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G06K7/086
sensing passive circuit, e.g. resonant circuit transponders
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