Let's consider a case that's fairly well-known to guitarists that happened in 1977 or so.
One of the most iconic electric guitars is the Gibson Les Paul. It's a solid-body guitar with a single cutaway, two pickups, and a distinctive headstock design.
A Japanese company (Ibanez) made a copy of the Les Paul that was every bit as good as (and some say better than) the original. It did not say Gibson on the headstock, it said Ibanez, but it was stylized to resemble the Gibson logo from a distance. The headstock, body and other parts were direct copies of the Gibson original. The guitars were marked with the correct country of origin.
Gibson sued and won. Many containers of these instruments were seized by Customs and destroyed, and Ibanez was forced to stop producing them.
So, ethical or not, cloning or whatever you want to call it is in fact illegal.
One of the most iconic electric guitars is the Gibson Les Paul. It's a solid-body guitar with a single cutaway, two pickups, and a distinctive headstock design.
A Japanese company (Ibanez) made a copy of the Les Paul that was every bit as good as (and some say better than) the original. It did not say Gibson on the headstock, it said Ibanez, but it was stylized to resemble the Gibson logo from a distance. The headstock, body and other parts were direct copies of the Gibson original. The guitars were marked with the correct country of origin.
Gibson sued and won. Many containers of these instruments were seized by Customs and destroyed, and Ibanez was forced to stop producing them.
So, ethical or not, cloning or whatever you want to call it is in fact illegal.