What a great find, Modernicus. I downloaded the index (Patronyms et noms communs) and searched the PDF for various clarinet makes. I have a Barbier Albert system clarinet, and as expected, F. Barbier is there as a subsidiary of Selmer. It's also no surprise that neither Gunckel, Lacroix, nor Dujardin are mentioned. As discussed elsewhere, these were never real companies, and the actual makers of those clarinets remain a mystery.
I've just bought (but not yet received) another Albert clarinet marked "Drouelle, Paris," and there's no mention of that name either. I had never heard of Drouelle, but it's evidently one more fictitious brand to add to the list.
