What "patented products" can be copied?

1, foreign patented products that have not been patented in China. Because the patent law is a domestic law, it is only effective in China (called territory), and products that are not patented in China are not recognized as patented products in China, so they can be completely copied in China, not only for domestic sales, but also for export to countries and regions where products are not patented. Attention should be paid to the issues of "priority" and "administrative protection" here.

2. Terminated and invalid patents. All countries in the world stipulate that patents have a certain time limit (called prescription), and the patented products of patented technology that exceed the time limit become public wealth, and anyone can use them for free. In addition, it is necessary to pay an annual fee to safeguard its patent right. According to statistics, 60% of the patents in the world were abandoned within half the time limit, and the patents were terminated. The third category is the patent that has obtained the patent right, which was later revoked or declared invalid by the administrative organ, and its patent right is "regarded as nonexistent from the beginning"

3. Unauthorized "patents". Only the patent application number has no patent number, and there is no patent application, which is not a patent at all, but we should pay attention to whether it is possible to obtain a patent right in the future.