US PATENT SUBCLASS 52 / 651.05
.~.~.~ For supporting hoisting or boring equipment (e.g., derrick, gantry)

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

633  DF  OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12}
648.1  DF  .~ Three-dimensional space-defining {9}
651.01  DF  .~.~ Vertically oriented (e.g., tower, etc.) {4}
651.05.~.~.~ For supporting hoisting or boring equipment (e.g., derrick, gantry) {1}
651.06  DF  .~.~.~.~> Inclined struts or ties meeting at intermediate runner

DEFINITION

Classification: 52/651.05

For supporting hoisting or boring equipment (e.g., derrick, gantry):

(under subclass 651.01) Subject matter wherein the openwork structure is intended to be used to support hoisting or boring equipment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

111+, for drill columns, crane booms, etc.