Johann Wilhelm Haas (1649 – 1723), was a German trumpet maker and engraver.
Biography He was born in Nuremberg and was a member of the Haas family of brass instrument makers.The trumpets of J.W. Haas: a survey of four generations of Nuremberg brass instrument makers, Galpin Society Journal, xviii, London, 1965 His baroque trumpets were used in courts across Germany and he carried on correspondence with court purveyors about repairs and replacements. He engraved his signature on the trumpets he repaired and replaced.
He died in Nuremberg.
References
Johann Wilhelm Haas correspondence on "Historic Brass" website