An interesting tidbit, but probably not a smoking gun. Watchtower as a term, word or reference is not exclusive to the crooks (formerly) of Crooklyn* Heights (any Hendrix fans out there?).
Corporate name searches turn up all sorts of things. Aussie JWs and exes might find it interesting to do a business/company name search on the Australian Securities and Investments Commission (ASIC) website. Searching for the words "Watchtower" and "Jehovah" does actually yield some WT related entities. And a name change of one such entity.
I imagine if you did similar searches in the databases of the various US state Secretary of State departments, you'd find plenty of WT related entities. But simply having a word like "Watchtower" or "Jehovah"** in a name proves nothing.
*Damned tablet tried to autocorrect me!
** There are 63 entries for this name in the ASIC database. Rutherford and his cronies, contrary to their insistence, were hardly the first or only people to use that name.