(under subclass 721) Apparatus in which the earth working element has an earth breaking portion and separately attached members or wings extending laterally beyond the sides thereof and forming a continuation of said portion the wings and earth-breaking portion together forming a symmetrical implement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
193+, for an earth working implement and a trailing sweep spaced therefrom so as to constitute separate tools.
728, for a symmetrical tool with an attached runner or depth
gauge and also having blades extending from opposite sides of the runner.
765+, for a tool having dissimilar wings or a wing extending from only one side thereof.
