Drilldown: Patents
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Patents > Inventor country
:
IT
or
US
& Supplementary to patent:
Patent US-1919-02-25 Alfredo Guillermo Leigh
& IPCs
:
IPC B64C1/00
or
IPC B64C3/54
or
IPC B64C33/00
& Cites these patents
:
1904
or
Patent DE-1910-236694
or
Patent FR-1911-438363
or
USPC 244/26
or
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