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{{PatentInfo |Inventor=Charles R. Keeran |Assignee=Keeran Products Company |Country=US |ApplicationNum=60230 |ApplicationDate=1925-10-25 |PatentNum=1301057 |PatentDate=1928-12-11 |PriorityDate=1925-10-25 |Titolo=Mechanical pencil |Marca=Eversharp |Desc...
{{PatentInfo
|Inventor=Charles R. Keeran
|Assignee=Keeran Products Company
|Country=US
|ApplicationNum=60230
|ApplicationDate=1925-10-25
|PatentNum=1301057
|PatentDate=1928-12-11
|PriorityDate=1925-10-25
|Titolo=Mechanical pencil
|Marca=Eversharp
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica.
|Inventor=Charles R. Keeran
|Assignee=Keeran Products Company
|Country=US
|ApplicationNum=60230
|ApplicationDate=1925-10-25
|PatentNum=1301057
|PatentDate=1928-12-11
|PriorityDate=1925-10-25
|Titolo=Mechanical pencil
|Marca=Eversharp
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica.