Thanks Emre for agreeing with the logic.
Perhaps Farret worked for Vogt?
Maybe a question to the company (Fortis) could clear this up, as they may have records showing Farret's name somewhere. This would be in their own interests, as any information regarding the history of the company in automatics would surely be welcome to them.
If Harwood's name is nowhere to be seen on either patent, Fortis needs to rethink that book, unless proof positive can be found contrari-wise!