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Brief Description/Derivation: National classification
Detailed Description: Domestic or national classification data. Contains a main classification, any number of official cross-reference classifications, and any number of un-official cross-reference classifications.
Content Model:
(B521,B522*,B522US*)
Parent(s):
Attributes: None
Tag Minimization: Both the start- and end-tags are required for this element.
Markup Instructions: For U.S. patents this is always the United States Patent Classification (USPC).
Example Text:
<B520> <B521><PDAT>544 48</PDAT></B521> <B522><PDAT>544 91</PDAT> </B522><B522><PDAT>544281</PDAT></B522><B522><PDAT>546121</PDAT></B522> <B522><PDAT>548154</PDAT></B522><B522><PDAT>548218</PDAT></B522><B522> <PDAT>5483031</PDAT></B522><B522><PDAT>5483601</PDAT></B522> </B520>
Example Image:
