See 17 U.S.C. ?? 101 (providing copyright protection for works of artistic craftsmanship insofar as their form but not their mechanical or utilitarian aspects"); CCM Cable Rep, Inc. v. Ocean Coast Props., Inc., 97 F.3d 1504, 1519-20 (1st Cir. 1996) (copyright law denies protection to forms of expression directed solely at functional considerations).