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{{PatentInfo |Inventor=David Finburgh,Alec Finburgh |Assignee=Wyvern Fountain Pen Co. |Country=GB |ApplicationNum=6186/37 |ApplicationDate=1937-03-02 |PatentNum=472380 |PatentDate=1937-09-22 |PriorityDate=1937-03-02 |Titolo=Improvements relating to pr...
{{PatentInfo
|Inventor=David Finburgh,Alec Finburgh
|Assignee=Wyvern Fountain Pen Co.
|Country=GB
|ApplicationNum=6186/37
|ApplicationDate=1937-03-02
|PatentNum=472380
|PatentDate=1937-09-22
|PriorityDate=1937-03-02
|Titolo=Improvements relating to propelling pencils
|Marca=Wyvern
|Descrizione=Matita meccanica.
}}
==Informazioni==
Brevetto per una matita meccanica.
|Inventor=David Finburgh,Alec Finburgh
|Assignee=Wyvern Fountain Pen Co.
|Country=GB
|ApplicationNum=6186/37
|ApplicationDate=1937-03-02
|PatentNum=472380
|PatentDate=1937-09-22
|PriorityDate=1937-03-02
|Titolo=Improvements relating to propelling pencils
|Marca=Wyvern
|Descrizione=Matita meccanica.
}}
==Informazioni==
Brevetto per una matita meccanica.