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Patents > Applicant firm: None & National tech categories : GB 4 propel & steer or IT 8 & Number of diagram pages: 2-3

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navigation (8) · propulsion (8) · frame (5) · propeller (5) · rudder (5) · LTA (4) · heavier-than-air (3) · marine (3) · glider (2) · steam (2) · flapping (2) · takeoff (2) · design (2) · subsystem (2) · car (2) · whole (2) · balloon (2) · aluminum (2) · airplane (2) · stability (2)
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