US PATENT SUBCLASS 33 / 624
.~.~ Earth contacting or working

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

501  DF  GAUGE {61}
613  DF  .~ Collocating {14}
624.~.~ Earth contacting or working {1}
625  DF  .~.~.~> Trenching tool depth

DEFINITION

Classification: 33/624

Earth contacting or working:

(under subclass 613) Subject matter wherein the gauge contacts a tool which touches the earth or performs some type of work on the earth or a support for such a tool.

(1) Note. Earth working of this subclass type includes excavating or scraping the earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

521, for earth-contacting gauges for determining the local profile of the earth.

SEE OR SEARCH CLASS

172, Earth Working,

430, for earth working apparatus with sighting means.