Current location - Health Preservation Learning Network - Slimming men and women - What does the patent for mask stand for?
What does the patent for mask stand for?
You can check.

The difference between having a patent and not having a patent is that those with a patent number can be found, and those without a patent number do not rule out the possibility of false propaganda.

Patents are generally documents issued by government agencies or regional organizations representing several countries according to their applications. This kind of document records the contents of the invention and creation, and in a certain period of time, it has produced such a legal state that the patented invention and creation can only be implemented by others with the permission of the patentee. In China, there are three kinds of patents: inventions, utility models and designs.