The musical scales and everything are tools. By, the keys sounded different 100 years ago, and different 200 years ago and so on. They have evolved. There isn't one inventor. But the pitch of the A has become higher the last years, the relations between the notes have changed. In fact, one that is pretty much not used at all and will sound dissonant to most people is the natural relations of notes. That's where it started.. Invented by physics!
It's the same as people who use a computer to do their job. No, they didn't invent that, but they use it as a tool.
I do agree that most of the intellectual property is actually owned by publishers. Publishers can't control their 'property' any more because it's so simple to copy the music. They have become useless, because they are not needed any more in order to distribute the music. So that part of the industry is now slowly dying and they all the actions they take are just a symptom of them dying.
In most countries it takes 70 years after the death of the author before their invention/product/music becomes public domain. Disney want to stretch this because Micky Mouse is soon becoming PD and of course they want exclusive rights because they want to make money. It's commercial business, simple as that. But mister Disney himself is long way dead, so why should Micky Mouse still make money?
I think things should become PD as soon as the author dies, after all, the author won't make any more money..
But musicians should be able to get money by making their music, otherwise they wouldn't be able to make the music they make!
@ Intrepid, new systems are being invented every day.. Especially in the 70's people started to think of new systems. None of these are protected. Think of people like Ligeti, Stockhausen, Boulez, Xenakis. Why are they not protected? Because they are tools.