Drilldown: Patents
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Patents > Office:
DE
& Filing date:
1911
& Application number
:
1732817
or
321247D
or
496388D
or
airfoil
& National tech categories
:
DE 77h
or
DE 77h.2
or
DE 77h.5
& CPCs
:
CPC B64C17/00
or
CPC B64C39/005
& Number of figures:
4 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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