Top IPC subclasses
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1
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G01M
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3
|
testing static or dynamic balance of machines or structurestesting structures or apparatus not other
|
|
2
|
G01N
|
2
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
3
|
F17D
|
1
|
pipe-line systemspipe-lines
|
|
4
|
C07C
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1
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Acyclic or carbocyclic compounds
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|
5
|
C09B
|
1
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organic dyes or closely-related compounds for producing dyesmordantslakes
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