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{{PatentInfo |Inventor=James Jeff |Assignee=Conway Stewart & Co., James Jeff |Country=GB |ApplicationNum=25761/33 |ApplicationDate=1933-09-18 |PatentNum=424069 |PatentDate=1935-02-14 |PriorityDate=1933-09-18 |Titolo=Improvements in or relating to mecha...
{{PatentInfo
|Inventor=James Jeff
|Assignee=Conway Stewart & Co., James Jeff
|Country=GB
|ApplicationNum=25761/33
|ApplicationDate=1933-09-18
|PatentNum=424069
|PatentDate=1935-02-14
|PriorityDate=1933-09-18
|Titolo=Improvements in or relating to mechanically operated lead pencils
|Marca=Conway Stewart
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica.
|Inventor=James Jeff
|Assignee=Conway Stewart & Co., James Jeff
|Country=GB
|ApplicationNum=25761/33
|ApplicationDate=1933-09-18
|PatentNum=424069
|PatentDate=1935-02-14
|PriorityDate=1933-09-18
|Titolo=Improvements in or relating to mechanically operated lead pencils
|Marca=Conway Stewart
|Descrizione=Matita meccanica
}}
==Informazioni==
Brevetto per una matita meccanica.