Real metal Patent on our trucks

[Ricos54]

I've been talking with this guy that told me that the patent on our truck parts was sold to China a long time ago and that even though Mar-K said it's American it's not. He said China own's the right's and Mar-K would have some type of deal with China in order to make these bed parts. Farther more he said the metal also came from China that it takes a lot to make metal and to stretch into shape of what ever we buy. Whatever the case he say's it's still coming from China.
I'm not wanting to start some heated debate I just want to know if this guy I talk to is right or he is full of it?

Thanks