Dennis,
but who first made the piano is the one that should be protected by copyright and not yamaha that make a copy from first piano.
but you can copyright the songs you made with yamaha piano.
I have explained in my post,
Other examples:
You can copyright what you write or draw with a pencil, but you Can not copyright the pencil itself.
so hardware music instruments sounds are just like a pencil.
hardware music instruments sound=real music instruments sound, analog synths sound, digital music instumrnts sound(digital is simple a copy from real instruments and analog synth but not a new music intrument).
[This message has been edited by AFG Music (edited 06-07-2010).]