US PATENT SUBCLASS 172 / 142
.~ Including spring formed tool or standard


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



172 /   HD   EARTH WORKING

133  DF  DIVERSE TOOLS {29}
142.~ Including spring formed tool or standard


DEFINITION

Classification: 172/142

(under subclass 133) Apparatus in which one of the diverse earth working elements comprises an earth working element which is formed of or supported directly upon a member formed of resilient material.

(1) Note. A pivoted tool having means to bias the tool about the pivot is not included under this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

389+, for spring-tooth type implements having runners or other wheel substitutes.

643, for plural spring teeth in a single implement.

707+, for spring teeth, per se.