The exercise of eminent domain is not limited to real property. Condemnors may also take personal property, even intangible property such as contract rights, patents, trade secrets, and copyrights. Even the taking of a professional sports team's franchise has been held by the California Supreme Court to be within the purview of the "public use" constitutional limitation, although eventually, that taking (of the Oakland Raiders' NFL franchise) was not permitted because it was deemed to violate the interstate commerce clause of the U.S. Constitution.