Drilldown: Patents
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Patents > Office
:
??
or
BE
or
DE
or
HU
& Inventor country
:
DE
or
RO
& Grant date:
1920 - 1929
& IPCs
:
IPC B64B1/58
or
None
& Number of text pages:
1
& Number of diagram pages:
1
& Number of figures:
1-2 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 6 results in range #1 to #6.