The design files don't qualify for copyright protections, they describe the design which (maybe) qualifies for copyright protections.[0]
The artistic design of a specific keyboard can certainly be copyrighted, but not the functional nature of it.
[0]The exact wording might be protected, but not the factual information contained. Sports scores, or say measurements of a keyboard, are not copyrightable items as they are just facts, though their presentation might be.
The design files don't qualify for copyright protections, they describe the design which (maybe) qualifies for copyright protections.[0]
The artistic design of a specific keyboard can certainly be copyrighted, but not the functional nature of it.
[0]The exact wording might be protected, but not the factual information contained. Sports scores, or say measurements of a keyboard, are not copyrightable items as they are just facts, though their presentation might be.