The big problem is that all big brands do not manufacture their own hardware. In you example of hp, they shop around and assemble from different suppliers, then they stick there own logo
So l would say what can really be authentic is only there logo, anything else can not truly be theirs. Take again like all the iPad, they are all manufactured in China using factories built and run by Chinese but the brand is American.
lts stil debatable but thus how l see it.