1. Apply directly to the patent office of the country you want to apply for, such as directly to the US Patent Office; It is generally better to find a local agency;
2. Make an international application to WIPO through the PCT channel, and then enter the country that wishes to apply through the PCT within 30 months.
Comparison of the advantages and disadvantages of these two methods:
If you clearly know the country you want to apply for, and there are not many countries you want to apply for, you can apply directly, which can save money. If you are not sure which country the product will sell well, you'd better apply through PCT, which takes 30 months to make a decision. Although it cost more than 10 thousand yuan, it is actually more economical than finding mistakes after direct input.