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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1/00
Sampling; Preparing specimens for investigation
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G01N1/02
Devices for withdrawing samples
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G01N1/2226
Sampling from a closed space, e.g. food package, head space
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G01N2001/2238
the gas being compressed or pressurized
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