US PATENT SUBCLASS 440 / 79
.~ Propeller arrangement

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

49  DF  SCREW PROPELLER {12}
79.~ Propeller arrangement {2}
80  DF  .~.~> Tandem {1}
82  DF  .~.~> Supporting strut

DEFINITION

Classification: 440/79

Propeller arrangement:

(under subclass 49) Device having a specified connection to the vessel or a specified relationship with other propellers.