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{{PatentInfo |Inventor=William Tonkowich |Assignee=L. E. Waterman Company |Country=US |ApplicationNum=218145 |ApplicationDate=1951-03-29 |PatentNum=2770221 |PatentDate=1956-11-13 |PriorityDate=1951-03-29 |Titolo=Fountain pen |Marca=Waterman |Descrizio...
{{PatentInfo
|Inventor=William Tonkowich
|Assignee=L. E. Waterman Company
|Country=US
|ApplicationNum=218145
|ApplicationDate=1951-03-29
|PatentNum=2770221
|PatentDate=1956-11-13
|PriorityDate=1951-03-29
|Titolo=Fountain pen
|Marca=Waterman
|Descrizione=Alimentatore
}}
==Informazioni==
Brevetto per un alimentatore. Riferimenti a {{MentionPatent|US|1574929}}, {{MentionPatent|US|1750410}}, {{MentionPatent|US|2101304}}, {{MentionPatent|US|2292381}}, {{MentionPatent|DE|406609}} e {{MentionPatent|US|2380763}}.
|Inventor=William Tonkowich
|Assignee=L. E. Waterman Company
|Country=US
|ApplicationNum=218145
|ApplicationDate=1951-03-29
|PatentNum=2770221
|PatentDate=1956-11-13
|PriorityDate=1951-03-29
|Titolo=Fountain pen
|Marca=Waterman
|Descrizione=Alimentatore
}}
==Informazioni==
Brevetto per un alimentatore. Riferimenti a {{MentionPatent|US|1574929}}, {{MentionPatent|US|1750410}}, {{MentionPatent|US|2101304}}, {{MentionPatent|US|2292381}}, {{MentionPatent|DE|406609}} e {{MentionPatent|US|2380763}}.