Can I apply for a patent for someone else's invention after I have made some improvements myself?

The application can be applied with a little modification, but it is hard to say whether it is authorized or not. . If the change is obvious, that is, the technological invention after the change has obvious creativity, novelty and practicality, then you can apply for a patent completely, and the possibility of authorization is not great.

According to the provisions of the Patent Law, inventions and utility models that are granted patent rights must be novel, creative and practical, that is, the so-called "three characteristics" of patents. This is a norm generally adopted by patent laws in various countries, and it is also a norm confirmed by the Agreement on Trade-related Aspects of Intellectual Property Rights (TRIPS) of the World Trade Organization (from the Shenzhen-China Joint Intellectual Property Rights).