I can't help thinking your Solorock bike looks as though it was made by a Chinese firm under licence from Dahon..My wife has a folding bike made by Yeah under licence from Dahon..I have a Ridgeback folding bike also made under licence from Dahon..
Other firms I have seen which make Dahon clones are Ecosmo and Biceco..In fact your bike is the exact copy of a Biceco bike for sale in Thailand this year..