Top IPC subclasses
1
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G01N
|
2
|
Investigating or analysing materials by determining their chemical or physical properties
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2
|
G01J
|
2
|
measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics o
|
3
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
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