Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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27/00
Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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G01N27/72
by investigating magnetic variables
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G01N27/82
for investigating the presence of flaws
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