Drilldown: Patents
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Patents > Office
:
NO
or
UN
or
Other
& Filing date:
1800 - 1899
& Application number
:
navigation
or
None
& National tech categories
:
GB 4 propel & steer
or
USPC 244/3.23
or
USPC 244/80
& IPCs:
IPC A01H5/02
& Number of diagram pages:
2-70 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.