2. Whether it was authorized to other companies before;
3. It is also necessary to search the patent rights of the patent in various countries in the world and whether the products produced are sold to these countries. Whether the sales to these countries can be protected.
4. The key is to analyze and test the imported patented technology to see if it can be implemented normally in actual production. Because when applying for a patent, the patentee often hides the key points in order to realize it from a theoretical point of view; But it is really applied to industrial production; A key angle, temperature and other small problems often lead to completely different results.
Therefore, when signing a contract, don't completely conform to the contents of the patent specification; We should also consider various factors in production.
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