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{{PatentInfo |Inventor=Edward M. Slack |Assignee=Edward M. Slack |Country=US |ApplicationNum=638573 |ApplicationDate=1923-05-12 |PatentNum=1510613 |PatentDate=1924-10-07 |PriorityDate=1923-05-12 |Titolo=Combined pencil and fountain-pen construction |Ma...
{{PatentInfo
|Inventor=Edward M. Slack
|Assignee=Edward M. Slack
|Country=US
|ApplicationNum=638573
|ApplicationDate=1923-05-12
|PatentNum=1510613
|PatentDate=1924-10-07
|PriorityDate=1923-05-12
|Titolo=Combined pencil and fountain-pen construction
|Marca=Unbranded
|Descrizione=[[Combo]] stilo/matita
}}
==Informazioni==
Brevetto per una combinazione (''[[Used for feature::combo]]'') di stilografica e matita meccanica.
|Inventor=Edward M. Slack
|Assignee=Edward M. Slack
|Country=US
|ApplicationNum=638573
|ApplicationDate=1923-05-12
|PatentNum=1510613
|PatentDate=1924-10-07
|PriorityDate=1923-05-12
|Titolo=Combined pencil and fountain-pen construction
|Marca=Unbranded
|Descrizione=[[Combo]] stilo/matita
}}
==Informazioni==
Brevetto per una combinazione (''[[Used for feature::combo]]'') di stilografica e matita meccanica.