What are the most digital patents?

It is divided into four plates: for example, 97 10 17654. The first part is the first two parts, indicating the year when the patent application was filed. For example, "97" refers to the application filed in 1997; The second paragraph consists of the third digit, indicating the type of patent application, and "1" indicates invention (if "2" indicates utility model, "3" indicates design); The third paragraph consists of the fourth to eighth digits, indicating the serial number of this kind of application in the current year, for example, 0 1765 indicates the application in the current year 1765; The fourth paragraph consists of the ninth digit or symbol, which is the computer parity bit. It can be any number or character x between 0 and 9, such as "4" in this example.