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ElementINIDDescription
classification-cpc52
Cooperative Patent Classification. For Format is according to WIPO ST. 8. For more information on CPC, see Cooperative Patent Classification in IFI Claims Direct. The full list of CPC codes can be found on the CPC website or the USPTO website.

When available, F and L symbols may indicate first and later classifications as in the following example: 

Code Block
languagexml
<classification-cpc mxw-id="PCL-1583949427" load-source="docdb" scheme="CPC">G01F1/6965 20130101 FI20130101BHEP </classification-cpc> 
<classification-cpc mxw-id="PCL-1583981588" load-source="docdb" scheme="CPC">G01F1/72 20130101 LI20130101BHEP </classification-cpc>


combination-sets
Group of CPC symbols that have one base class and one or more subsequent ranked symbols that are linked together to convey special classification information. See https://www.cooperativepatentclassification.org/publications/CpcCSets.pdf for more information.

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