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{{PatentInfo |Inventor=Robert W. Randolph |Assignee=The Parker Pen Company |Country=US |ApplicationNum=619518 |ApplicationDate=1945-10-01 |PatentNum=2428854 |PatentDate=1947-10-14 |PriorityDate=1945-10-01 |Titolo=Writing instrument |Marca=Parker |Descr...
{{PatentInfo
|Inventor=Robert W. Randolph
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=619518
|ApplicationDate=1945-10-01
|PatentNum=2428854
|PatentDate=1947-10-14
|PriorityDate=1945-10-01
|Titolo=Writing instrument
|Marca=Parker
|Descrizione=Penna a sfera
}}
==Informazioni==
Brevetto per una penna a sfera. Riferimenti a {{MentionPatent|US|2398548}} e {{MentionPatent|US|378897}}, ed inoltre {{MentionPatent|GB|189002017}}.
|Inventor=Robert W. Randolph
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=619518
|ApplicationDate=1945-10-01
|PatentNum=2428854
|PatentDate=1947-10-14
|PriorityDate=1945-10-01
|Titolo=Writing instrument
|Marca=Parker
|Descrizione=Penna a sfera
}}
==Informazioni==
Brevetto per una penna a sfera. Riferimenti a {{MentionPatent|US|2398548}} e {{MentionPatent|US|378897}}, ed inoltre {{MentionPatent|GB|189002017}}.