Is "copy of patent book" the same as "copy of patent certificate"?

No, there is a clear difference between the two. "Copy of patent book" is the relevant document reflecting the ownership of patent and the change information. There is no difference between "copy of patent certificate" and patent certificate, except that the word "copy" is marked on it. Although they are all "copies", the handling methods and precautions are still very different. In particular, the number of "copies of patent certificates" is limited, and no one can apply for copies of certificates without restrictions, while "copies of patent books" are not restricted. At present, official fees are required for "copy of patent book" and "copy of patent certificate". When dealing specifically with "copywriting", we need to focus on the differences between the two and handle them as appropriate.