Maybe it's because YAMAHA own KORG!
Yamaha don’t own Korg.
And as for the name of the sound, as was said above. You cannot copyright a description of a sound.
But for what it’s worth, my old Korg Wavestation SR has a patch on it called Sweet Tenor Sax.

Regards.
Sharp.
[This message has been edited by Irishacts (edited 06-06-2005).]