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Notice: Trying to access array offset on value of type int in /home/econterm/econterms.net/aero/extensions/Cargo/drilldown/CargoFilterValue.php on line 79 Drilldown: Patents - Inventing aviation
Patents > Year filed:
1920 - 1929& Year granted:
1921& Applicant type:
INDIV& Tech fields:
propeller& Related to aircraft:
1& Assigned to:
None& Cites these patents:
None& Number of claims:
2-3