(under subclass 243) Means and methods in which the material is sifted by movement of the sifter against a mass of the material instead of the latter being delivered to the sifter.
SEE OR SEARCH CLASS
37, Excavating,
315+, for shell-fish dredgers.
171, Unearthing Plants or Buried Objects,
84+, for reticulated devices which comb through the soil or a mass of earth having object embedded therein to collect or gather desired objects therefrom.
