US PATENT SUBCLASS 119 / 233
.~.~ Cover, light or ray affecting

Current as of: June, 1999
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119 /   HD   ANIMAL HUSBANDRY

200  DF  AQUATIC ANIMAL CULTURING {5}
215  DF  .~ Fish culturing {12}
233.~.~ Cover, light or ray affecting

DEFINITION

Classification: 119/233

Cover, light or ray affecting:

(under subclass 215) Subject matter including means to selectively intercept visible light and other radiation impinging upon the water surface of a fish pond or tank.