Drilldown: Patents
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Patents > Application number:
421192D
& Assigned to:
None
& National tech categories
:
FR 6.4
or
USPC 244/22
& IPCs
:
IPC B64C23/00
or
IPC B64C39/00
or
IPC CPC B64C13/00
& Family year:
1910
& Citations from after 1930:
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