Can I apply for a one-time patent pilot unit certificate?

No, a patent application should examine three attributes: novelty, creativity and practicality. If someone else has applied for a patent or it is already on the market, then the technology is old. If you can't apply, it means that people all over the world can use it for free. For example, China's four great inventions must be rejected. -supplement. If someone else has applied and no one can get the same patent again, it is useless to limit the protection period of the patent to 20 years, which is not conducive to the progress of science and technology. The annual patent fee is increased year by year in order to let the patentee give up his rights in advance and make it public to the whole world.