Drilldown: Patents
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Patents > National tech categories :
FR 6.2 or
USPC 244/30
& IPCs :
IPC B64C1/00 or
IPC B64C3/00 or
IPC B64C33/02 or
None
& CPCs :
CPC B64C13/00 or
CPC B64C2700/6295
& Number of claims:
2
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