US PATENT SUBCLASS 405 / 153
.~.~.~ With separate fastening means between adjacent panels

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

132  DF  UNDERGROUND PASSAGEWAY, E.G., TUNNEL {6}
150.1  DF  .~ Lining {2}
151  DF  .~.~ Panel {2}
153.~.~.~ With separate fastening means between adjacent panels

DEFINITION

Classification: 405/153

With separate fastening means between adjacent panels:

(under subclass 151) Method or apparatus wherein each platelike segment is assembled to each adjacent segment by a discrete securing means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

135, for means to secure one circumferentially continuous tunnel section to another.