US PATENT SUBCLASS 440 / 71
.~ Propeller guard

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

49  DF  SCREW PROPELLER {12}
71.~ Propeller guard {1}
72  DF  .~.~> Cage or screen

DEFINITION

Classification: 440/71

Propeller guard:

(under subclass 49) Device wherein a means outside of a casing for the propulsion unit is provided which protects the propeller on at least one side from impact with submerged objects.