Drilldown: Patents
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- Airplane (18)
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- Letters (683)
- Organizations (964)
- Patents (17557)
- Person (2115)
- Publications (24564)
- Techtypes (2373)
Patents > Year filed:
1889
& Year granted:
1880 - 1889
& Supplementary to patent
:
1
or
Patent DE-1907-206614
or
None
& National tech categories
:
AT 77d
or
DE 77 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.