Transfer of Patent: Nr. 58308. A Method of Producing a Powder Mixture Releasing Heat. Marie Gurtwirthova (Praha) to Pavel Just (Kolín nad Labem). Patentní věstník (Patent Bulletin 1938, p. 202)
Patentni vestnik 1938 202
Transfer of Patent: Nr. 58308. A Method of Producing a Powder Mixture Releasing Heat. Marie Gurtwirthova (Praha) to Pavel Just (Kolín nad Labem). Patentní věstník (Patent Bulletin 1938, p. 202)