Piccardi
{{PatentInfo |Inventor=Henry Krause |Assignee=Henry Krause |Country=US |ApplicationNum=411747 |ApplicationDate=1929-12-05 |PatentNum=1808045 |PatentDate=1931-06-01 |PriorityDate=1929-12-05 |Titolo=Clip structure for fountain-pen caps, pencils and the l...