− | Brevetto il meccanismo dello ''[[snorkel]]''. Riferimento a {{MentionPatent|US|2123110}}, {{MentionPatent|US|2139045}}, {{MentionPatent|US|2158615}}, {{MentionPatent|US|2404063}}, {{MentionPatent|US|2158615}}, {{MentionPatent|US|2610612}} e {{MentionPatent|US|2681041}}. | + | Brevetto il meccanismo dello ''[[snorkel]]''. Riferimento a {{MentionPatent|FR|822691}}, {{MentionPatent|US|2123110}}, {{MentionPatent|US|2139045}}, {{MentionPatent|US|2158615}}, {{MentionPatent|US|2404063}}, {{MentionPatent|US|2158615}}, {{MentionPatent|US|2610612}} e {{MentionPatent|US|2681041}}. |