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{{PatentInfo |Inventor=Philip C. Hull, George W. Gilman |Assignee=The Parker Pen Company |Country=US |ApplicationNum=739276 |ApplicationDate=1947-03-31 |PatentNum=2504420 |PatentDate=1950-04-18 |PriorityDate=1947-03-31 |Titolo=Magazine pencil with rota...
{{PatentInfo
|Inventor=Philip C. Hull, George W. Gilman
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=739276
|ApplicationDate=1947-03-31
|PatentNum=2504420
|PatentDate=1950-04-18
|PriorityDate=1947-03-31
|Titolo=Magazine pencil with rotary lead propelling means
|Marca=Parker
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica. Riferimenti a {{MentionPatent|US|1621990}}, {{MentionPatent|US|1864038}} e {{MentionPatent|US|2116136}}.
|Inventor=Philip C. Hull, George W. Gilman
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=739276
|ApplicationDate=1947-03-31
|PatentNum=2504420
|PatentDate=1950-04-18
|PriorityDate=1947-03-31
|Titolo=Magazine pencil with rotary lead propelling means
|Marca=Parker
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica. Riferimenti a {{MentionPatent|US|1621990}}, {{MentionPatent|US|1864038}} e {{MentionPatent|US|2116136}}.