Drilldown: Patents
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Patents > Office
:
DE
or
IT
or
UN
& Inventor country:
DE
& Applicant firm:
None
& Filing date:
May 1908
& National tech categories
:
DE 77h.11
or
FR 6.3
& Number of figures:
4 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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