Drilldown: Patents
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Patents > Grant date:
May 9, 1911
& Publication date:
1911
& IPCs :
IPC B64C27/04 or
IPC B64C3/18 or
IPC B64C3/54 or
IPC B64C39/00
& CPCs :
CPC B64C3/00 or
CPC B64C39/008
& First filing:
Yes
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