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Patents > Year granted: 1900 - 1909 & Inventor country : ES or Prussia

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LTA (10) · balloon (8) · navigation (6) · propulsion (5) · subsystem (4) · stability (4) · whole (3) · rudder (3) · gas (3) · frame (3) · electronics (2) · remote control (2) · marine (2) · instrument (2) · None (2) · design (2) · cybernetics (2) · communications (2)
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