If Led Zeppelin ripped off Spirit, then both bands ripped off Granata—and Granata's work is in the public domain, as are any other examples of this musical idea that precede him. So even under the far-too-restrictive set of rules that make up modern..."
http://reason.com/blog/2016/06/23/copyright-case-against-stairway-to-heave
-vk-
