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| Number | Title | Issue Date |
| 5261497 | Multiple implement hitch and steerable wheel assembly therefor Hitch structure for connecting first and second implements for operation side-by-side in the field, and one directly behind the other for transport. A freely rockable swing hitch has a forward end connected to one side of the first implement frame for piv... | 11/16/1993 |
| 5163518 | Down force adjustment and lift for an opener supported from a frame by lift arms A plurality of parallel arm type openers are mounted on a frame tube, and a rockshaft is supported directly below the tube. Adjacent each of the openers, a lever arm is fixed for rotation with the rockshaft and, upon rotation of the rockshaft in a first d... | 11/17/1992 |
| 5054560 | Transporting caster wheels Lift arms on a gang of implements support transport wheels which are movable from a raised field-working position to a lowered endwise towing position. Several of the wheels at the forward and aft ends of the towed gang of implements are fitted with caste... | 10/08/1991 |
