According to Richard Mahrholdt’s 1952 edition of  WaffenLexicon für Jäger und Schützen Bruno Weiss (Weiß) was the proprieter of a Waffenfabrik in Goldlauter near Suhl. 

Heer Der Neue Støckel list the following in Suhl:

J. H. Weiss (Weis) circa 1720-1740

Johann George Weiss (Weis) circa 1760-1780.

Stefan Weiss (Weis) Vienna, Austria 1762-1829, from Suhl, Meister there in 1808.  

 The relationship if any between Bruno and Fritz and the Weiss’ listed above is unknown at this time. 

                              

These images are courtesy-