From 1st March 2012, as a depositing Office (the Office of first filing), the State Intellectual Property Office of China (SIPO) can deposit the electronic priority document through the priority document Digital Access Service (DAS) based on the request of the applicant.
As an accessing Office (the Office of second filing), the SIPO will recognize priority documents available to it through the service for the purposes of later Chinese applications filed on or after 1st March 2012 based on the request of the applicant. It is very easy and convenient for the patent applicant to provide a digital priority document instead of paper one to the SIPO as well as others.
Beside the SIPO, the DAS participating Offices update on 13 February 2012, include the Patent Offices of AU, DK, ES, FI, GB, IB, JP, KR, SE & US.
The current list of the participating Offices is available at address：