Are the fees charged by patent agencies the same?

Of course not. The cost of writing a single invention ranges from 4000- 1W, or even higher. Since we attach importance to the application prospect of this patent, we should not pay too much attention to the quotation. For non-standardized services, it is difficult to measure the cost performance, but you can compare several companies and find the one you feel comfortable with. Huantai intellectual property is ok.