Etablissements Charles Juéry
8 rue de Jarente, Paris
Manufacturer of commercial triporteurs, including one powered by a sidevalve 500cc LMP engine with a Staub gearbox, as described in a rather entertaining article in Zhumoriste which also describes a remarkable example in St-Dizier fitted with a Zundapp KS750 by by Vidal Ortiz. The fastest ice-cream van on earth is not connected with Juery.
Other models were fitted with LMP two-strokes.
Sources: JLBcreations, zhumoristenouveau.eklablog.com