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{{PatentInfo |Inventor=Wilbur K. Olson, Lynn P. Martin |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=575407 |ApplicationDate=1945-01-31 |PatentNum=2473690 |PatentDate=1949-06-21 |PriorityDate=1945-01-31 |Titolo=Clip for writing instr...
{{PatentInfo
|Inventor=Wilbur K. Olson, Lynn P. Martin
|Assignee=W. A. Sheaffer Pen Company
|Country=US
|ApplicationNum=575407
|ApplicationDate=1945-01-31
|PatentNum=2473690
|PatentDate=1949-06-21
|PriorityDate=1945-01-31
|Titolo=Clip for writing instruments
|Marca=Sheaffer
|Descrizione=Clip a molla
}}
==Informazioni==
Brevetto una clip a molla. Riferimento a {{MentionPatent|US|1085174}}, {{MentionPatent|US|1863016}}.
|Inventor=Wilbur K. Olson, Lynn P. Martin
|Assignee=W. A. Sheaffer Pen Company
|Country=US
|ApplicationNum=575407
|ApplicationDate=1945-01-31
|PatentNum=2473690
|PatentDate=1949-06-21
|PriorityDate=1945-01-31
|Titolo=Clip for writing instruments
|Marca=Sheaffer
|Descrizione=Clip a molla
}}
==Informazioni==
Brevetto una clip a molla. Riferimento a {{MentionPatent|US|1085174}}, {{MentionPatent|US|1863016}}.