Drilldown: Patents
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Patents > Year filed:
1891
& Year granted:
1890 - 1899
& Office :
DK or
GB or
IT or
Other
& Inventor country :
DZ or
US
& IPCs :
IPC B64C39/00 or
None
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engine (1) ·
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stability (2)
Showing below up to 10 results in range #1 to #10.