Bethesda Softworks has registered a trademark for Fallout 4 with the "Office for the Harmonization of the Internal Market." The filing can be viewed on this page showing it scientific instruments, fire-extinguishing apparatus, and a host of other things, including computer software. This related on The Vault, where they note that Bethesda made a similar filing for Fallout; New Vegas approximately four months before officially announcing that installment in the post-apocalyptic RPG series. Thanks No Mutants Allowed.