.~ Porous or apertured pipe, flume, or tileway {6}
49
.~.~ Corrugated
DEFINITION
Classification: 405/49
Corrugated:
(under subclass 43) Method and apparatus wherein the water-conducting member includes a series of alternate ridges and grooves extending about the entire periphery.
(1) Note. The ridges and grooves must be both inside and outside of the conducting member for placement in this subclass.
