US PATENT SUBCLASS 37 / 347
DITCHER

Current as of: June, 1999
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37 /   HD   EXCAVATING

347DITCHER {8}
348  DF  .~> Condition responsive
349  DF  .~> With crumber
350  DF  .~> Having screw digger {1}
352  DF  .~> Having endless digger {1}
364  DF  .~> With side or auxiliary cutter {1}
91  DF  .~> Wheel excavator {2}
366  DF  .~> Plow {5}
379  DF  .~> Shovel or scoop {1}

DEFINITION

Classification: 37/347

DITCHER:

(under the class definition) Apparatus including means to penetrate the ground for digging a long narrow trench in the surface of the ground.

SEE OR SEARCH THIS CLASS, SUBCLASS:

307+, for a device for forming an underwater trench.

381+, for a device for working on forming a road.

446+, for a detailed digging edge.

SEE OR SEARCH CLASS

175, Boring or Penetrating the Earth,

19+, for boring successive, parallel, or overlapping holes vertically in the earth to ultimately form a trench.

299, Mining or In Situ Disintegration of Hard Material,

24+, and 29+ for trenching in hard material such as rock or ice.

405, Hydraulic and Earth Engineering,

154+, for trenching in combination with pipe or cable laying, retrieving, or underwater manipulation; subclasses 282+ for trench shoring.