Piccardi
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Piccardi
{{PatentInfo |Inventor=William F. Johnson |Assignee=The Mentmore Manufacturing Company Limited |Country=GB |ApplicationNum=3712/39 |ApplicationDate=1939-02-03 |PatentNum=524710 |PatentDate=1940-08-13 |PriorityDate=1939-02-03 |Titolo=Improvements in fou...
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