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{{PatentInfo |Inventor=John C. Wahl |Assignee=The Wahl Company |Country=US |ApplicationNum=210517 |ApplicationDate=1918-01-05 |PatentNum=1301341 |PatentDate=1919-02-22 |PriorityDate=1918-01-05 |Titolo=Self-feeding pencil |Marca=Eversharp |Descrizione=M...
{{PatentInfo
|Inventor=John C. Wahl
|Assignee=The Wahl Company
|Country=US
|ApplicationNum=210517
|ApplicationDate=1918-01-05
|PatentNum=1301341
|PatentDate=1919-02-22
|PriorityDate=1918-01-05
|Titolo=Self-feeding pencil
|Marca=Eversharp
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica.