According to a note on the EPO’s Asian Patent Helpdesk, the Chinese patent office has adopted a new numbering scheme for published applications and issued patents. Prior to April 2010, applications and patents were published with different numbers. The new system uses the same number for both stages with the appropriate document kind code, e.g. A, A8 and A9 for published applications and B, B8 and B9 for granted patents.
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