Drilldown: Patents
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Patents > National tech categories :
DE 77h or
USPC 244/80
& CPCs :
CPC B64C17/00 or
CPC B64C3/385
& Number of claims:
8-20
& Number of figures:
2-4
Use the filters below to narrow your results.
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airfoil (1) ·
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automatic stability (2) ·
balance (1) ·
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Whole (1)
Showing below up to 7 results in range #1 to #7.