US PATENT SUBCLASS 405 / 46
.~.~ Earthen bottom


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

Internet Version by PATENTEC © 1999      Terms of Use



405 /   HD   HYDRAULIC AND EARTH ENGINEERING

36  DF  DRAINAGE OR IRRIGATION {7}
43  DF  .~ Porous or apertured pipe, flume, or tileway {6}
46.~.~ Earthen bottom


DEFINITION

Classification: 405/46

Earthen bottom:

(under subclass 43) Method or apparatus wherein the water-conducting member is in the form of an inverted open channel.