Earlier quoted context omitted.
I don't think there is such a name. But you're on the right track about it being difficult to distinguish between value and rent-seeking. One thing to note is that governments themselves are, by definition, rent-seekers. This is inherent to how a government - a monopoly on the legitimate use of violence within an area - works. Once you are sovereign within a territory you can extract rents in the form of taxes, and i…
Excluding the direct political arguments, is there hope for a clean way to distinguish these types of activities: * Someone who literally figures out a new, cheap way to make a drug which cures a real disease * Someone who, as soon as they get the right to, imposes license fees which serve no valid purpose, and profits in status & wealth from these new duties.
The original idea with these sorts of things, at least in the US, is that we'd have administrative procedures and court adjudication to limit the harm that could come from that behavior. In practice, the administrative procedures are only a bar to the least knowledgeable plaintiffs, and the mere threat of litigation over a marginally valid claim is often enough to coerce most defendants into a settlement. Nobody wants to actually litigate whether or not a patent is obvious, or a copyright owner has been surreptitiously seeding their own works on BitTorrent.
There's also a question about whether or not your two examples are, in practice, always different cases. What if the person in the first example decides to not license their drug at all, so they can do the manufacturing themselves and control the price? That would be identical behavior to the second example... but they still made a useful invention. They're the same person.
You could legally restrict "non-practicing entities" from enforcing patent rights, but that's only a subset of all rent-seeking patent owners. Remember: the entire point of the system is to enable rent-seeking in lieu of up-front payments.