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{{PatentInfo |Inventor=Robert W. Randolph |Assignee=The Parker Pen Company |Country=US |ApplicationNum=620442 |ApplicationDate=1945-10-05 |PatentNum=2481874 |PatentDate=1949-09-13 |PriorityDate=1945-10-05 |Titolo=Ball-point writing instrument |Marca=Pa...
{{PatentInfo
|Inventor=Robert W. Randolph
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=620442
|ApplicationDate=1945-10-05
|PatentNum=2481874
|PatentDate=1949-09-13
|PriorityDate=1945-10-05
|Titolo=Ball-point writing instrument
|Marca=Parker
|Descrizione=Penna a sfera
}}
==Informazioni==
Brevetto per una penna a sfera. Riferimenti a {{MentionPatent|US|378897}}, {{MentionPatent|US|1947282}}, {{MentionPatent|US|2367892}} e {{MentionPatent|US|2398548}}, ed inoltre {{MentionPatent|DE|210230}} e {{MentionPatent|GB|537039}}.
|Inventor=Robert W. Randolph
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=620442
|ApplicationDate=1945-10-05
|PatentNum=2481874
|PatentDate=1949-09-13
|PriorityDate=1945-10-05
|Titolo=Ball-point writing instrument
|Marca=Parker
|Descrizione=Penna a sfera
}}
==Informazioni==
Brevetto per una penna a sfera. Riferimenti a {{MentionPatent|US|378897}}, {{MentionPatent|US|1947282}}, {{MentionPatent|US|2367892}} e {{MentionPatent|US|2398548}}, ed inoltre {{MentionPatent|DE|210230}} e {{MentionPatent|GB|537039}}.