Can the patent application documents submitted by express delivery be accepted?

Patent application documents submitted by express delivery can be accepted. But need to pay attention to one thing:

If a registered letter is sent by post office, the application date of the patent shall be subject to the postmark date sent.

If the patent is delivered by courier service other than post office, the filing date of the patent shall be calculated according to the actual date of receipt in China National Intellectual Property Administration.

For the details of patent application, please consult the quick method platform.