That's was probably the wrong way to word it because yes foreign patents aren't enforced by the US. The Paris treaty I was referring to regulates why a patent

That's was probably the wrong way to word it because yes foreign patents aren't enforced by the US. The Paris treaty I was referring to regulates why a patent can be denied. For instance its says that the US has to treat patent applications from citizens of member countries the same as US petitioners. For example, the US can't show favoritism to domestic companies (with respect to other countries who've signed the treaty) when granting patents--they can't just deny patent protections to Chinese petitioners because they are Chinese. (I'm guessing there are nation security exceptions, but I'm not an expert, I've just researched this from a business perspective.) And the US has to honor the priority date of foreign signatories patents (assuming certain conditions are met).