Piccardi
{{PatentInfo |Inventor=Frederik G. Heard |Assignee=Mabie, Todd and Company Limited |Country=GB |ApplicationNum=3929/30 |ApplicationDate=1930-02-05 |PatentNum=348036 |PatentDate=1931-05-05 |PriorityDate=1930-02-05 |Titolo=Improvements in or relating to ...