Piccardi
{{PatentInfo |Inventor=Lynn P. Martin, Elmer D. Thompson, Roland L. Brannon, Lee W. Ross |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=609281 |ApplicationDate=1956-09-11 |PatentNum=2949887 |PatentDate=1960-08-23 |PriorityDate=1956-09...