Interesting recent discussion/debate between minarchist Richard Epstein and anarchist libertarian Michael Huemer at Victor Niederhoffer’s “Junto” meeting in New York. Go to around 1:07:22 or so. Some guy asks a question about patent law in a free society.
Huemer seems to oppose patent law, though in a fairly tepid and unprincipled fashion. Epstein has respectable arguments for minarchy over anarchy, but his arguments for patent law are completely hollow: his case is basically empirical and utilitarian, but he offers no empirical evidence to back up his pro-patent contentions (no one else has either, that I am aware of).
A few minutes later, Epstein argues for a muscular US government to keep order, etc.