US PATENT SUBCLASS 172 / 815
.~.~ Contiguous, relatively adjustable blades; or blade having relatively adjustable earth-engaging parts

Current as of: June, 1999
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172 /   HD   EARTH WORKING

810  DF  MOUNTING FOR PUSHED TOOL AT END OF MOTOR VEHICLE {3}
811  DF  .~ Transversely mounted blade (e.g., bulldozer, etc.) {11}
815.~.~ Contiguous, relatively adjustable blades; or blade having relatively adjustable earth-engaging parts

DEFINITION

Classification: 172/815

Contiguous, relatively adjustable blades; or blade having relatively adjustable earth-engaging parts:

(under subclass 811) Apparatus in which (a) an auxiliary blade is mounted so as to be adjacent to, and adjustable with respect to, the main blade; or (b) the blade's working face is comprised of plural parts which can be adjusted with respect to each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

701.1+, for particular blade structure, per se, and especially for a blade having removable parts.