This patent claim has five technical features. If someone imitates four of them and makes another product, is it infringement?
China's patent law stipulates that infringement judgment is a universally applicable principle. A cup has five technical features, one of which is about the handle. Others removed this technical feature about the cup handle and made it into a cup without a handle, so it did not completely cover all the technical features of the patent and did not consider it infringement. But it is impossible to apply for a new patent, because all the technical features in the new application have been disclosed in an earlier patent, so he cannot apply for a patent. You have added a technical feature to the cup patent that no one else has applied for. You can apply for a patent by adding a cup handle, but whether you can authorize it depends on whether the cup with the handle can satisfy novelty and creativity.