US PATENT SUBCLASS 60 / 503
.~.~.~ In which the control means is variable

Current as of: June, 1999
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60 /   HD   POWER PLANTS

495  DF  MOTOR HAVING A BUOYANT WORKING MEMBER {2}
497  DF  .~ Working member actuated by the rise and fall of a surface of a body of fluid {9}
502  DF  .~.~ Having fluid flow or wave controlling, confining or directing means {1}
503.~.~.~ In which the control means is variable

DEFINITION

Classification: 60/503

(under subclass 502) Apparatus having means whereby the fluid flow, the surface wave movement or amplitude, or the volume of confined fluid may be variably controlled.