Drilldown: Patents
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Patents > Supplementary to patent:
Patent BE-1911-04-14 Lucien-Constant-Joseph Harel
& IPCs
:
IPC B64C3/00
or
IPC B64C33/00
& Number of figures:
1-3 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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