Practicality means that the invention or utility model can be manufactured or used and can produce positive effects. "Capable of being manufactured or used" means that the technical scheme of the invention or utility model has the possibility of being manufactured or used in industry. Technical solutions that meet practical requirements should not violate the laws of nature and should be reproducible. The lack of practicality due to the inability to manufacture or use is caused by the inherent defects of the technical scheme itself, which has nothing to do with the openness of the manual. Several main situations that are not practical:
1, no reproducibility
2, against the laws of nature
3. Products with unique natural conditions
4. Non-therapeutic surgical methods for human or animal bodies.
5. Methods for measuring physiological parameters of human body or animal body in extreme cases.
6, no positive effect