Drilldown: Patents

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Patents > Office : CA or DE or NL & Inventor country : RU or US & Number of text pages: 3-70 & Number of diagram pages: 2-3

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Tech fields:
airplane (9) · LTA (6) · propellers (5) · Design (4) · HTA (3) · frame (3) · flapping (3) · navigation (3) · wings (3) · rudder (3) · airship (3)
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