Common law copyright
Common law copyright is the legal doctrine which grants copyright protection based on common law of various jurisdictions, rather than through protection of statutory law, like the federal copyright statute.
In part, it is based on the contention that copyright is a natural right and creators are therefore entitled to the same protections anyone would be in regard to tangible and real property. The proponents of this doctrine contended that creators had a perpetual right to control the publication of their work (also see perpetual copyright).