(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.
