Yes. Off the top of my head, ACAZ / ZACCO (Ateliers de Contructions Aeronautiques de Zeebruge), Avions Fairey, LACAB, SABCA, Stampe & Vertongen, and probably many others.Other than the Renard 40 and related projects, did Belgium have any other combat aircraft designs in the works between 1930 and 1940?
Plus Fairey.