Ну это как-то совсем непоследовательно выглядит
In The Ethics of Liberty (published first in 1982), Rothbard applies this contract rationale not only to copyrights, but also to patents, urging that the inventor of a mousetrap, for example, may successfully prohibit others from selling an identical mousetrap to the extent that the inventor retains a piece of “the property right in each mousetrap.” Rothbard contended that, as a practical matter, libertarian principles must entail the ability to limit purchasers’ rights regarding a work or invention, and thus to similarly limit all others’ rights—even when these others are not parties to the original contract. “[N]o one,” Rothbard argued, “can acquire a greater property title in something that has already been given away or sold.” According to this account, then, if the original purchaser’s rights had been limited by his agreement with the inventor, then so too would be those of every latecomer.