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{{PatentInfo |Inventor=Richard J. Mansheim |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=433521 |ApplicationDate=1954-06-01 |PatentNum=2868173 |PatentDate=1959-01-13 |PriorityDate=1954-06-01 |Titolo=Writing instrument |Marca=Sheaffer...
{{PatentInfo
|Inventor=Richard J. Mansheim
|Assignee=W. A. Sheaffer Pen Company
|Country=US
|ApplicationNum=433521
|ApplicationDate=1954-06-01
|PatentNum=2868173
|PatentDate=1959-01-13
|PriorityDate=1954-06-01
|Titolo=Writing instrument
|Marca=Sheaffer
|Descrizione=Meccanismo dello ''[[snorkel]]''
}}
==Informazioni==
Brevetto per il meccanismo dello ''[[snorkel]]''. Riferimento a {{MentionPatent|DE|294495}}, {{MentionPatent|US|2610612}} e {{MentionPatent|US|2769427}}.

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