− | Brevetto per una penna a stilo. Riferimenti a {{MentionPatent|DE|689598}}, {{MentionPatent|DE|716752}}, {{MentionPatent|DE|738888}}, {{MentionPatent|DE|744671}}, {{MentionPatent|FR|946434}}, {{MentionPatent|FR|990094}}, {{MentionPatent|GB|657351}}, {{MentionPatent|US|2217502}}, {{MentionPatent|US|2472343}}, {{MentionPatent|US|2495179}}, {{MentionPatent|US|2595097}}. | + | Brevetto per una penna a stilo. Riferimenti a {{MentionPatent|DE|689598}}, {{MentionPatent|DE|716752}}, {{MentionPatent|DE|738888}}, {{MentionPatent|DE|744671}}, {{MentionPatent|FR|946434}}, {{MentionPatent|FR|990094}}, {{MentionPatent|GB|657351}}, {{MentionPatent|US|2217502}}, {{MentionPatent|US|2472343}}, {{MentionPatent|US|2495179}}, {{MentionPatent|US|2595097}}. {{SamePatent|US|2805645}} {{SamePatent|FR|1094189}} {{SamePatent|BG|749290}} {{SamePatent|CA|556148}} |