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{{PatentInfo |Inventor=David Kahn, Morris Levy |Assignee=David Kahn Inc. |Country=US |ApplicationNum=441464 |ApplicationDate=1954-06-06 |PatentNum=2811948 |PatentDate=1957-11-05 |PriorityDate=1954-06-06 |Titolo=Locking device for fountain pen |Marca=W...
{{PatentInfo
|Inventor=David Kahn, Morris Levy
|Assignee=David Kahn Inc.
|Country=US
|ApplicationNum=441464
|ApplicationDate=1954-06-06
|PatentNum=2811948
|PatentDate=1957-11-05
|PriorityDate=1954-06-06
|Titolo=Locking device for fountain pen
|Marca=Wearever
|Descrizione=Gruppo pennino intercambiabile
}}
==Informazioni==
Brevetto per un gruppo 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}}.
|Inventor=David Kahn, Morris Levy
|Assignee=David Kahn Inc.
|Country=US
|ApplicationNum=441464
|ApplicationDate=1954-06-06
|PatentNum=2811948
|PatentDate=1957-11-05
|PriorityDate=1954-06-06
|Titolo=Locking device for fountain pen
|Marca=Wearever
|Descrizione=Gruppo pennino intercambiabile
}}
==Informazioni==
Brevetto per un gruppo 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}}.