How long does it take Yuyao to apply for a patent?

It is best to send it directly to the National Patent Office in Beijing. It will be handled by the relevant local authorities and will also be handed over to Beijing. If there are no mistakes, it will take about half a year, 4-5 months. After the certificate was issued, several of us applied at the same time. If there is a mistake, it will take 1-2 months, because it will be called back for you to modify it before sending it. Personally, I suggest looking for an agent. They are more professional and only need 200-2 months. After I got the certificate, I waited for more than a week of continuous bombing of advertising letters, hehe, but it was quite enjoyable. I have never received so many letters at the same time in my life.