Drilldown: Patents
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Patents > IPCs :
IPC B64C27/04 or
IPC B64C39/00
& CPCs :
CPC B64C17/00 or
CPC B64C27/12
& Family year:
1914
& First filing:
Yes
Use the filters below to narrow your results.
Showing below up to 3 results in range #1 to #3.