DEMARTEAU Gilles Joseph.
140 Rue Large Voie, Herstal (1903-1910).
Inscription with the Liege Proof House 1901/1902 – later DEMARTEAU Gilles & fils in 1903 and then DEMARTEAU Gilles-Joseph & fils 1903/1922.
4 patents in Belgium (rifle, auto pistol, hunting gun).
