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US 1994488

Igor Sikorsky's Early Design for a Vertical Takeoff Aircraft

A 1935 patent by aviation pioneer Igor Sikorsky detailing a mechanical configuration for an aircraft capable of direct vertical lift.

Statusexpired

Granted1935

Expires1951

Claims0

Forward citations16

Prior art0

AssigneeSikorsky Aircraft Corp

InventorsIgor I Sikorsky

Patent B

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