2. The application process is different: the invention review is strict, and preliminary review and substantive review are needed. The utility model can only pass the preliminary examination.
3. Different protection periods: the invention is valid for 20 years, and the utility model is 10 years.
4, reflected in the patent number is also different: at present, China's patent law stipulates that the first four digits of the patent number are the year number. The fifth place can only be 1, 2, 3, 8, 9. Where 1 refers to invention and 2 refers to utility model. The last digit is the serial number, and the last digit of the decimal is the check digit.