(under subclass 452) Apparatus wherein there are a plurality of earth working elements and means are provided for raising all the earth working elements as a unit and for selectively lowering each element separately.
SEE OR SEARCH THIS CLASS, SUBCLASS:
228, for separate tools alternating for right or left hand operation which may be simultaneously raised and held in raised position by separate latches.
462, for plural tools independently spring- biased down and raised at a unit.
481, for tools which are held in position by a latch means separate from the actuating means.
