Drilldown: Patents
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Patents > Year filed:
1911
& Application number:
426420D
& Supplementary to patent :
Patent FR-1907-373818 or
None
& National tech categories :
AT 77d or
HU V/h or
USPC 244/119
& CPCs :
CPC B64C13/00 or
CPC B64C3/385 or
CPC B64C35/00
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