Piccardi
{{PatentInfo |Inventor=Brook Arthur Denis |Assignee=Conway Stewart & Co. |Country=GB |ApplicationNum=29088/64 |ApplicationDate=1969-07-14 |PatentNum=1255389 |PatentDate=1971-12-01 |PriorityDate=1969-07-14 |Titolo=Improvements in and relating to a writ...