Drilldown: Patents
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Patents > National tech categories
:
FR 6.4
or
HU V/h
or
USPC 244/3.23
or
None
& IPCs:
IPC B64C3/56
& Family year:
1911
& Number of text pages:
3-4 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 6 results in range #1 to #6.