Mornin LR.
Agreed. However the patent does cover a 3 axis aerodynamic controller as I read it: albeit bolted on to the deck (?) of the dirigible.
I have talked to submariners on their vessels' similarities to airships and apparently they bank at speed underwater.
I expect you know that in practice most airships are flown slightly "heavy" for better control response- even being seen to do rolling take -offs on occasion.