Nummernliste der deutschen Patentschriften mit Angabe der Klassen, Unterklassen und Gruppen, hrsg. vom Reichspatentamt.

By: Material type: TextTextPublication details: Berlin, C. Heymann, 1928.Edition: 2. AuflDescription: 2 p. l., 1148 p. 30 cmSubject(s): LOC classification:
  • T273.D5 A53 1928
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