.~ Implement with ground support for depth control {3}
78
.~.~ Vertically adjustable ground support
DEFINITION
Classification: 172/78
(under subclass 76) Apparatus in which the ground contacting supporting member is adapted to be vertically adjustably connected to the driven implement whereby the normal working
depth of the earth working element may be altered by moving said ground-contacting supporting members from one vertical position to another.
(1) Note. See the class definition for the meaning of "adjustable".
