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{{PatentInfo |Inventor=Duncan Mackinnon |Assignee=Duncan Mackinnon |Country=US |ApplicationNum=217888 |ApplicationDate=1879-03-07 |PatentNum=217888 |PatentDate=1879-07-29 |PriorityDate=1879-03-07 |Titolo=Improvements in stylographic fountain-pens |Marc...
{{PatentInfo
|Inventor=Duncan Mackinnon
|Assignee=Duncan Mackinnon
|Country=US
|ApplicationNum=217888
|ApplicationDate=1879-03-07
|PatentNum=217888
|PatentDate=1879-07-29
|PriorityDate=1879-03-07
|Titolo=Improvements in stylographic fountain-pens
|Marca=MacKinnon
|Descrizione=Penna a stilo
}}
==Informazioni==
Brevetto per una penna a stilo. {{MentionPatent|US|174965}} Stampigliato sul corpo delle omonime penne [[Imprinted on::MacKinnon]] (vedi [[:File:1881-MacKinnon.jpg]]).
|Inventor=Duncan Mackinnon
|Assignee=Duncan Mackinnon
|Country=US
|ApplicationNum=217888
|ApplicationDate=1879-03-07
|PatentNum=217888
|PatentDate=1879-07-29
|PriorityDate=1879-03-07
|Titolo=Improvements in stylographic fountain-pens
|Marca=MacKinnon
|Descrizione=Penna a stilo
}}
==Informazioni==
Brevetto per una penna a stilo. {{MentionPatent|US|174965}} Stampigliato sul corpo delle omonime penne [[Imprinted on::MacKinnon]] (vedi [[:File:1881-MacKinnon.jpg]]).