Vocabulary :

D.B.G.M.

stands for the term Deutsches Bundesgebrauchsmuster, meaning that the use and/or function of an item was officially registered, as explained on the ⇒Musterschutz page.

This specific mark form was introduced 1949 as successor of the ⇒Deutsches Reichsgebrauchsmuster (D.R.G.M.) marking.