Drilldown: Patents
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Patents > Year granted:
1918
& Office
:
ES
or
FI
or
IT
or
US
& Full specification filed date:
1910 - 1919
& Grant date:
1900 - 1999 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 4 results in range #1 to #4.