Drilldown: Patents
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Patents > Office
:
BE
or
CA
or
DE
or
LU
& Grant date:
1800 - 1899
& IPCs
:
IPC B64C3/00
or
None
& Number of text pages:
2
& Number of figures:
3-4 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 7 results in range #1 to #7.