Drilldown: Patents

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Patents > Year granted: 1900 - 1909 & National tech categories : USPC 244/153R or USPC 244/30 or USPC 244/80

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Inventors:
Alexander Graham Bell (3)
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None (5) · Alexander Graham Bell (3)
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Tech fields:
LTA (19) · kite (15) · frame (11) · propulsion (9) · navigation (8) · stability (5) · car (5) · safety (5) · airplane (4) · propeller (4) · rudder (4) · marine (3) · parachute (3) · compartments (3) · balloon (3) · takeoff (3)
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