This is a place where European copyright law is significantly different from US copyright law. In the US, copyright cannot cover a "functional part", which is why there is a third party auto parts industry. Improved functionality can be covered by a utility patent, but that lasts only 20 years. Designs can be protected by design patents, which last only 15 years. So in the US, any rights left in the form of the Stratocaster expired long ago.

US companies sometimes try to make "trade dress" or trademark claims, but that's much weaker than copyright.