It’s not surprising that more scholarship self-identifying as IP-focused is about patents. After all, they drive much of commerce and innovation (and arguably the problems with the two) in the industrial and technology sectors.

It’s worth noting though that, unlike much of the protection afforded by a patent, many copyright protections are available even without registration, although it’s admittedly difficult to enforce them via litigation and to win statuory damages without timely registration.

Check out this PDF by the U.S. Copyright Office for more information.