US PATENT SUBCLASS 37 / 460
.~ Specific material (e.g., specialty steel, heat treatment of material, specific hardness test)

Current as of: June, 1999
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37 /   HD   EXCAVATING

446  DF  DIGGING EDGE {7}
460.~ Specific material (e.g., specialty steel, heat treatment of material, specific hardness test)

DEFINITION

Classification: 37/460

Specific material (e.g., specialty steel, heat treatment of material, specific hardness test):

(under subclass 446) Apparatus wherein the significance is attributed to a substance or treatment used in forming at least a part of a digging edge.

(1) Note. A mere recitation that a digging element or adapter is made of iron or steel is excluded from this subclass.