Geeze I don't know. We studied it pretty extensively in Copyright law class, but I couldn't tell you the dates. Do a google search or something. I know one big one was about reselling comic books.

But the previous cases set precedent, so I doubt "tariffs" will screw around with it.

Like I said. People are always challenging this stuff. Just because it's going to court doesn't mean shit. A couple of years ago, there was a case about reselling digital content on physical medium. It was over pretty quick.