− | Brevetto per un gruppo [[Used for feature::pennino]] intercambiabile. Riferimenti a {{MentionPatent|US|607398}}, {{MentionPatent|US|1315373}}, {{MentionPatent|US|1779836}}, {{MentionPatent|US|1787406}}, {{MentionPatent|US|1999177}}, {{MentionPatent|US|2016106}}, {{MentionPatent|US|2187528}} e {{MentionPatent|US|2289963}}. | + | Brevetto per un gruppo [[Used for feature::pennino]] intercambiabile. Riferimenti a {{MentionPatent|US|495647}}, {{MentionPatent|US|607398}}, {{MentionPatent|US|1315373}}, {{MentionPatent|US|1779836}}, {{MentionPatent|US|1787406}}, {{MentionPatent|US|1999177}}, {{MentionPatent|US|2016106}}, {{MentionPatent|US|2187528}}, {{MentionPatent|US|2217884}} e {{MentionPatent|US|2289963}}; ed inoltre {{MentionPatent|FR|59403E}}, {{MentionPatent|GB|273514}}. |