December 19, 1908, Marius François Jean-Marie Amiel filed a patent for a « Sifflet autophone imitant le son de la flûte » ("Autophon whistle imitating the flute sound"). The document was registered March 15, 1909, and published May 27, 1909 [FR398,148].
What a surprise and a disappointment to realise that the Amiel's patent is a simple and pure copy of 1899 Couchois' one! The nose flute has the same shape and this cannot be coincidental. What is "funny" however, is that Amiel corrected some Couchois' drawing mistakes (the labium exagerated height for instance).
First; Amiel's design, and then, Couchois'one:
This french patent is interesting though... Indeed, it means that Couchois' flute was undoubtedly produced, and with the shape of the patent. It had not been the "Chicago flute", since it was much later, but probably the "missing link" between the Chicago nose flute (1893) and the Stivers' Humanatone/Magic Nose Fute (1903).
Was it distributed in Europe? Probably not. It is more likely that Amiel met the nose flute during a travel to New York City.
Thanks to Christian Steinbrecher for helping finding this piece of nose flute history!