Piccardi
{{PatentInfo |Inventor=Norman E. Weigel |Assignee=Norman E. Weigel |Country=US |ApplicationNum=332256 |ApplicationDate=1953-01-21 |PatentNum=2690739 |PatentDate=1954-10-05 |PriorityDate=1953-01-21 |Titolo=Ink reservoir and flow control |Marca=Wearever ...