US PATENT SUBCLASS 440 / 73
.~ Self-clearing

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


440 /   HD   MARINE PROPULSION

49  DF  SCREW PROPELLER {12}
73.~ Self-clearing

DEFINITION

Classification: 440/73

Self-clearing:

(under subclass 49) Device wherein a means is provided which is integral with or closely adjacent the screw itself which prevents fouling of the screw by seaweed, ropelike objects, etc.