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{{PatentInfo |Inventor=Eduard Penkala |Assignee=Eduard Penkala |Country=GB |ApplicationNum=190616715 |ApplicationDate=1906-07-24 |PatentNum=190616715 |PatentDate=1906-10-25 |PriorityDate=1906-07-24 |Titolo=Improvements in Pencil-cases |Marca=Penkala |D...
{{PatentInfo
|Inventor=Eduard Penkala
|Assignee=Eduard Penkala
|Country=GB
|ApplicationNum=190616715
|ApplicationDate=1906-07-24
|PatentNum=190616715
|PatentDate=1906-10-25
|PriorityDate=1906-07-24
|Titolo=Improvements in Pencil-cases
|Marca=Penkala
|Descrizione=Porta-mine
}}
==Informazioni==
Brevetto di un porta mine. {{SamePatent|FR|06524E}} {{SamePatent|DE|183242}} {{SamePatent|DK|09918}}