Can the patent owners declared by the construction unit use it?

Yes. Patent rights can be granted to others for use. Patent implementation licensing, also known as patent license trade, refers to the patent technology owner or its licensor allowing others to implement the patent they own in a certain period, in a certain region, and in a certain way, and charging others a usage fee. A patent implementation license only transfers the right to use the patented technology. The transferor still owns the ownership of the patent. The transferee only obtains the right to implement the patented technology and does not own the ownership of the patent. Patent implementation licensing is a licensing trade in which the licensee is allowed to use its patent within a certain range by entering into a patent implementation licensing contract and paying royalties.