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| Number | Title | Issue Date |
| 5829535 | Common depth control adjustment for a ground opener An agricultural apparatus comprises a main frame with ground wheels supporting the frame for movement across the ground and a plurality of ground engaging openers mounted on the frame for engaging the ground. Each opener includes a depth control wheel mou... | 11/03/1998 |
| 5398771 | Grain Drill A grain drill is disclosed having a folding frame for parallel operation and a parallel link system that controls the tension to earth openers in order to produce relatively constant downward pressure for the openers. The grain drill includes a rotating t... | 03/21/1995 |
| 4615286 | Grain drill mounted harrow device An attachment for a tractor drawn grain drill is disclosed having a horizontal array of harrow tines staggered along a plurality of transverse rows with each row commonly supported by a rotatable control rod with a tine coiled portion encircling the contr... | 10/07/1986 |
| 4409911 | Listing and bed shaping apparatus with planter attachment and method A combination listing and bed shaping apparatus for use with a self-propelled vehicle having a three-point hitch. A tool bar assembly is provided which is secured to the three-point hitch so that tool bar assembly extends in a generally horizontal directi... | 10/18/1983 |
