US PATENT SUBCLASS 175 / 328
.~ Magnetized or with magnet

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

327  DF  BIT OR BIT ELEMENT {21}
328.~ Magnetized or with magnet

DEFINITION

Classification: 175/328

(under subclass 327) Apparatus in which the bit is provided with a magnet or with a magnetized portion.

(1) Note. The magnet or magnetized portion may comprise either a permanent magnet or an electromagnet.

(2) Note. A bit that may become magnetized during use is excluded.

SEE OR SEARCH CLASS

294, Handling: Hand and Hoist-Line Implements,

65.5, for a grapple adapted to be used in a borehole and provided with a magnet.