Drilldown: Patents
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Patents > Office :
CH or
DK or
ES or
FR or
NL
& Supplementary to patent :
Patent FR-1909-395148 or
& National tech categories :
DE 77h.5 or
FR 6.4
& IPCs :
IPC B64B1/00 or
IPC B64C3/00 or
IPC B64C39/00
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