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{{PatentInfo |Inventor=Philip C. Hull |Assignee=The Parker Pen Company |Country=US |ApplicationNum=556531 |ApplicationDate=1944-09-29 |PatentNum=2398531 |PatentDate=1946-04-16 |PriorityDate=1944-09-29 |Titolo=Filling mechanism for fountain pens |Marca...
{{PatentInfo
|Inventor=Philip C. Hull
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=556531
|ApplicationDate=1944-09-29
|PatentNum=2398531
|PatentDate=1946-04-16
|PriorityDate=1944-09-29
|Titolo=Filling mechanism for fountain pens
|Marca=Parker
|Descrizione=Il caricamento ''[[speedline]]''
}}
==Informazioni==
Brevetto per la variante ''[[speedline]] del [[caricamento vacumatic]]. Riferimenti a {{MentionPatent|US|1904358}} e {{MentionPatent|US|2223541}}.
|Inventor=Philip C. Hull
|Assignee=The Parker Pen Company
|Country=US
|ApplicationNum=556531
|ApplicationDate=1944-09-29
|PatentNum=2398531
|PatentDate=1946-04-16
|PriorityDate=1944-09-29
|Titolo=Filling mechanism for fountain pens
|Marca=Parker
|Descrizione=Il caricamento ''[[speedline]]''
}}
==Informazioni==
Brevetto per la variante ''[[speedline]] del [[caricamento vacumatic]]. Riferimenti a {{MentionPatent|US|1904358}} e {{MentionPatent|US|2223541}}.