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Kind codes are used to identify the different publication stages of a patent application or a patent.

The “standard” kind codes are:

A - patent application, published 18 months after filing or 18 months after the priority date

B or C - patent specification, published as soon as possible after grant

Read more about publication number formats and the special IPsurvey number format when manually adding references.

For more information on kind codes, see the WIPO handbook.



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