Law360, New York (February 20, 2015, 10:31 AM EST) -- Recently, Katy Perry sent a cease-and-desist letter to an artist selling 3-D printable plans for a figurine of the "Left Shark" backup dancer featured in the recording artist's Superbowl half-time performance. Perry claimed that the figurine infringed her copyright interest in the costume worn by the "Left Shark," who has achieved Internet fame due to its comparatively inferior dance skills than those of its counterpart, the "Right Shark." In response, the sculptor's attorney claimed that Perry's claim is meritless because the shark costume is a useful article that is not copyrightable. So is the shark costume protected under copyright law? Here's a summary of the relevant copyright law....