Drilldown: Patents
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Patents > Office
:
AH
or
DE
or
SAX
& Publication date:
1912
& National tech categories:
DE 77h.4
& CPCs
:
CPC B64C2700/6256
or
CPC B64C2700/6281
or
None
& Number of diagram pages:
None
& Number of figures:
None ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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