THIS is why a trademark search is important BEFORE you invest $millions into branding your product. If you intend to market internationally, get the trademark search done in every country that you intend to market in. And search to register in the correct category or categories….
iPhone can’t be iPhone in China. There’s a Chinese company that has registered the mark in the telephones category (Apple owns it for hardware and software). That, folks, is about 1/4 of the world’s population to which Apple cannot market under the current name of the product without going through some sort of legal maneuvering (getting the existing Chinese mark invalidated or reaching some sort of deal with the mark’s owner).
Best laid plans….