US PATENT SUBCLASS 405 / 42
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Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

36  DF  DRAINAGE OR IRRIGATION {7}
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DEFINITION

Classification: 405/42

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(under subclass 36) Method or apparatus wherein a tubular member is provided for applying water to or removing it from the soil, which member has means associated with it to cover or to surround the terminal end of the member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48, for apertured pipes having shielded outlets.