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 <publication-reference fvid="71329085" ucid="US-5551212-A" entity-status="large">
   <document-id>
     <country>US</country>
     <doc-number>5551212</doc-number>
     <kind>A</kind>
     <date>19960903</date>
     <lang>EN</lang>
   </document-id>
 </publication-reference>

Attribute

Description

fvid

Unique database-level integer identifier

ucid

See Common XML Attributes

entity-statusUS only; possible values are micro, small, large, or unknown

 

publication-reference/document-id

Element

INID

Description

country

19

The country is represented by a standard 2-character code based on WIPO ST.3.

doc-number

11

doc-number is generally provided in DOCDB-normalized format. An exception to this is made for WO documents, where the doc-number is normalized to YYYYnnnnnn. 
Patent document numbering is a complex subject, and these are some illustrative examples: US: 3732068, RE31783, 5382 (plant), D436240 (design), EP: 0129539, WO: 1985000002, JP: 60000013, 2006000022, DE: 3244404
For a complete discussion of document numbers over time and over multiple authorities, please see: Number format concordance - publication numbers at 
https://www.epo.org/searching-for-patents/helpful-resources/data/tables/regular.html

kind

13

The kind code is used to designate the publication stage of the document, including whether it is a published application or a granted patent. For a general discussion, see WIPO ST.16

date

14

Date of publication (YYYYMMDD)

lang

12

Language of publication, 2-character code based on ISO 639-2. Default value is "XX"

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