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  1. 1

    Preguntas y respuestas acerca de patentes

    Published 1971
    Book
  2. 2

    Patentes e invenciones: una guía informativa para inventores

    Published 1971
    Book
  3. 3

    Traité technique et pratique des brevets d'invention by Casalonga, Alain

    Published 1949
    Book
  4. 4
  5. 5

    Das deutsche patentamt: Aufgaben, Organisation und Arbeitsweise by Althammer, Werner von

    Published 1970
    Book
  6. 6