Drilldown: Patents
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Patents > Year granted:
1900 - 1999
& Inventor country:
DE
& Filing date:
1910
& Assigned to:
None
& National tech categories
:
DE 77h.5
or
USPC 244/139
& Family year:
1900 - 1999 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 4 results in range #1 to #4.