Back when the Wright Brothers proved to Paris that they really had an airplane that flew, and that you could actually steer and do things with, suddenly Paris started selling Wright-this and Wright-that.
Back when Benjamin Franklin came to town as our ambassador, everything was Franklin-this, Electric-that, and a la Americaine.
So it’s very realistic for alternate-world Paris to invent the Heterodyne hat.
(Sadly, it’s not true that the hobble skirt was inspired by Katherine Wright or Mme. Bleriot’s airplane rides.)