US PATENT SUBCLASS 440 / 51
.~ Combined with rudder

Current as of: June, 1999
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440 /   HD   MARINE PROPULSION

49  DF  SCREW PROPELLER {12}
51.~ Combined with rudder

DEFINITION

Classification: 440/51

Combined with rudder:

(under subclass 49) Device wherein the screw propeller is an integral part of the assembly which includes a vertical blade at the stern of a vessel used to change the direction of travel of that vessel when in motion.