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Patents > Year filed: 1908 & Applicant is inventor: None & First filing: None

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None (5) · Achille Bertelli (3) · Achille Bertelli fu Alessandro (2)
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Tech fields:
LTA (11) · airplane (10) · None (8) · propeller (7) · navigation (7) · propulsion (6) · balloon (5) · aerodynamics (4) · airfoil (3) · gas (2) · wings (2) · takeoff (2) · parachute (2) · nacelle (2) · marine (2) · helicopter (2) · instrument (2) · design (2) · car (2) · dirigible (2)
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