Drilldown: Patents
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Patents > Office:
RU
& Inventor country
:
AT
or
HU
or
RU
& Filing date:
1910 - 1919
& National tech categories
:
FR 6.4
or
USPC 244/3.23
& IPCs
:
IPC B64C11/00
or
IPC B64C39/00
& First filing:
No
& Number of text pages:
4 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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