B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
B63H 1/28 (2006.01)
Patent
CA 2122161
A propeller, one or more blades of which has the configuration of a sinusoidal curve wrapped around its shaft in a semi-circle and whose leading edge is at the nadir of the sine curve and whose trailing edge is at the zenith.
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