US PATENT SUBCLASS 405 / 302.1
.~.~.~ Subterranean roof plate


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}
288  DF  .~.~ Roof support {5}
302.1.~.~.~ Subterranean roof plate


DEFINITION

Classification: 405/302.1

Subterranean roof plate:

(under subclass 288) Subject matter comprising a plate, intended to be used in conjunction with a bolt, for supporting an overhead earthen formation (e.g., tunnel).

SEE OR SEARCH THIS CLASS, SUBCLASS:

259.1+, for rock or earth bolt or anchor.