US PATENT SUBCLASS 440 / 80
.~.~ Tandem

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

49  DF  SCREW PROPELLER {12}
79  DF  .~ Propeller arrangement {2}
80.~.~ Tandem {1}
81  DF  .~.~.~> On single shaft

DEFINITION

Classification: 440/80

Tandem:

(under subclass 79) Device wherein the propellers are arranged one behind the other.