Drilldown: Patents
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Patents > Year filed:
1911
& Grant date:
January 6, 1912
& Supplementary to patent:
None
& National tech categories
:
AT 77d
or
FR 6.4
or
USPC 244/119
& CPCs:
CPC B64C13/00
& Cites these patents
:
Patent FR-1909-411204
or
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