Patent rights are exhausted once and copyrights can be used continuously, which is determined by their respective characteristics.
(1) Exhaustion of patent rights, also known as the first sale doctrine. The core of this principle is: on the premise of protecting the legitimate rights and interests of patent holders, maintain normal market transaction order, protect the legitimate interests of operators and general consumers, facilitate the normal development of trade activities, and prevent patent rights from affecting domestic products. Market circulation creates obstacles.
(2) Copyright can be used continuously. The right of signature, right of modification, and right to protect the integrity of the work in copyright are permanent. According to Article 20 of the "Copyright Law": "The author's right of signature, right of modification, and right to protect the integrity of the work are permanent." The protection period of the right to modify and protect the integrity of the work is not limited. "This provision shows that not only during the author's lifetime, but also after the author's death, the law forever prohibits non-authors from forcibly signing the work, deleting the author's signature, or modifying the work without authorization. Modification (including modification of the title of the work) and distortion and tampering of the work that is contrary to the author's original intention and damaging to the author's reputation.