Drilldown: Patents
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Patents > Year filed:
1891
& Year granted:
1890 - 1899
& Office :
CH or
DK or
GB or
IT
& Inventor country :
DZ or
US
& IPCs :
IPC B64C39/00 or
None
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.