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|Assignee=The Eagle Pencil Company
 
|Assignee=The Eagle Pencil Company
 
|Country=US
 
|Country=US
|ApplicationNum=336360
+
|ApplicationNum=8180
 
|ApplicationDate=1900-03-10
 
|ApplicationDate=1900-03-10
 
|PatentNum=648839
 
|PatentNum=648839