US PATENT SUBCLASS 405 / 275
.~.~.~ Concrete

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

258  DF  EARTH TREATMENT OR CONTROL {5}
272  DF  .~ Shoring, bracing, or cave-in prevention {6}
274  DF  .~.~ Sheet piles {2}
275.~.~.~ Concrete

DEFINITION

Classification: 405/275

Concrete:

(under subclass 274) Method or apparatus wherein the elongated members are made of concrete, plain or reinforced.

SEE OR SEARCH THIS CLASS, SUBCLASS:

267, for subject matter relating to the formation of an underground wall, wherein a cementitious material is introduced into and directly contacts the sides of an excavation.