Page History

country

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

doc-number

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doc-number is provided in both DOCDBDocDB-normalized format and in the format provided by the publishing patent office. DOCDBDocDB-normalized format usually includes the filing year (2 or 4 digits) at the beginning or end unless the year is already embedded in the application number.

• US application numbers in DOCDB DocDB format have changed since late 2010 (beginning of series code 13, see link below for more details). USPTO "original" format always includes a prepended series code. 
• WO application numbers are formatted with a 2-digit year followed by a 5-digit serial number prior to 2004-01-01. Beginning with application dates in 2004, the format is 4-digit year followed by 6-digit serial number (e.g. 9813495 or 2004000001). A kind code of "W" must be used to distinguish WO applications from national office applications.
• JP application numbers include a 2-digit year as suffix until 2000; thereafter the 4-digit year is prepended (e.g. 131699 or 2007000849). 

For a complete discussion of application numbers in

DocDB over time and over multiple authorities,

see Number format concordance - application numbers at 
https://www.epo.org/searching-for-patents/helpful-resources/data/tables/regular.html.

kind

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Kind code for of applications comes from DOCDB DocDB or is inferred according to DOCDB rules (DocDB rules. Values include:

A=Patent

U=Utility

P=Provisional application

W=PCT

F=Design

T=Translation

date

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Date of filing of application (YYYYMMDD).