How to search the patent number on Batten? Why can't I find the patent number in it?

Search whether the digits of the patent number are normal. The number before 2003 was 9, and the number after 2003 was 13.

Baiteng.com's patent number search does not need to input ZL before the patent number.

Has this patent been published?

Use China National Intellectual Property Administration patent search for query.

Note: The first two or four digits of the patent number (two digits in the old patent number and four digits in the new patent number) represent the year of application, and the third or fifth digit (depending on the old and new patent number) represents what kind of patent it is ('1' represents the invention patent,' 2' represents the utility model patent and' 3' represents the design patent). Invention patents are the best, followed by utility model patents.