Drilldown: Patents
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Patents > Office
:
DE
or
GR
or
IT
& Applicant type
:
COMPANY+INDIV
or
UNIV-PRO-GOV
or
None
& Grant date:
1880
& IPCs
:
IPC B64C25/00
or
None
& Number of text pages:
1 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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