US PATENT SUBCLASS 172 / 1
PROCESSES
Current as of: June, 1999
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DEFINITION
Classification: 172/1
(under the class definition) Methods.
SEE OR SEARCH CLASS
37, Excavating,
195, for methods of excavating.
47, Plant Husbandry,
58.1, for methods of earth working combined with an additional nonearth working step such as adding fertilizer or treating the soil.
171, Unearthing Plants or Buried Objects, 1, for methods of earth working combined with an additional step of removing or separating a plant or buried object from the earth.
