Can the patent rights of holding companies and subsidiaries be used?

This is possible. At the application stage, the subsidiary and the parent company are the same applicants; After authorization, the parent company and subsidiary company are the same patentees.

However, the operation may be complicated. For example, if the parent company is an overseas company, it is a foreign-related application.

when the right to apply for a patent and the patent right are to be transferred, it is not decided by the parent company, and the transfer is invalid without the signature of the subsidiary.

both the parent company and its subsidiaries can implement patents, but they cannot separately license others to use them.

if the subsidiary is sold by the parent company, the patent right and patent application right should also be divided.