The question of what qualifies as intellectual property is an open question—
court cases come up all the time in which one party alleges that something
previously unmentioned in law enjoys copyright protection. The
Harley-Davidson Motorcycle Company sued Honda over its bikes’ exhaust
noise. Harley claimed that its bikes’ noise was a distinctive feature of their
design and enjoyed copyright protection. Harley lost, but this case gives an
indication of the evolving nature of intellectual property law....