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{{PatentInfo |Inventor=William F. Johnson |Assignee=Mentmore Manufacturing Company Limited |Country=GB |ApplicationNum=15921/36 |ApplicationDate=1936-06-06 |PatentNum=475970 |PatentDate=1937-11-30 |PriorityDate=1936-06-06 |Titolo=Improvements in or rel...
{{PatentInfo
|Inventor=William F. Johnson
|Assignee=Mentmore Manufacturing Company Limited
|Country=GB
|ApplicationNum=15921/36
|ApplicationDate=1936-06-06
|PatentNum=475970
|PatentDate=1937-11-30
|PriorityDate=1936-06-06
|Titolo=Improvements in or relating to self-filling fountain pens
|Marca=Mentmore
|Descrizione=Sistema di caricamento
}}
==Informazioni==
Brevetto per un sistema di caricamento a sfiatatoio, analogo al [[vacumatic filler]]. {{SamePatent|FR|822628}} {{SamePatent|US|2123110}}
|Inventor=William F. Johnson
|Assignee=Mentmore Manufacturing Company Limited
|Country=GB
|ApplicationNum=15921/36
|ApplicationDate=1936-06-06
|PatentNum=475970
|PatentDate=1937-11-30
|PriorityDate=1936-06-06
|Titolo=Improvements in or relating to self-filling fountain pens
|Marca=Mentmore
|Descrizione=Sistema di caricamento
}}
==Informazioni==
Brevetto per un sistema di caricamento a sfiatatoio, analogo al [[vacumatic filler]]. {{SamePatent|FR|822628}} {{SamePatent|US|2123110}}