Modifiche

{{PatentInfo |Inventor=Frederick W. Heinzman |Assignee=Mabie, Todd & Company Limited |Country=US |ApplicationNum=588594 |ApplicationDate=1925-09-01 |PatentNum=1551601 |PatentDate=1925-09-01 |PriorityDate=1922-09-16 |Titolo=Magazine pencil |Marca=Swan |...
{{PatentInfo
|Inventor=Frederick W. Heinzman
|Assignee=Mabie, Todd & Company Limited
|Country=US
|ApplicationNum=588594
|ApplicationDate=1925-09-01
|PatentNum=1551601
|PatentDate=1925-09-01
|PriorityDate=1922-09-16
|Titolo=Magazine pencil
|Marca=Swan
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica.