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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6612381 | Seedbed preparation implement having rotary disc with adjustable gang angle A disc gang is provided that is suitable for use as part of a multifunctional seedbed preparation implement or in a standalone disc harrow. The disc gang is configured to permit a gang angle of the disc gang to be adjusted to accommodate differing soil co... | 09/02/2003 |
| 4308919 | Hinge-type offset wheel harrow Two gang disc harrow units are pivotally joined near corresponding ends by a vertical axis hinge coupling. Near their opposite corresponding ends, the harrow units are connected by a collapsible toggle linkage which operates in a horizontal plane under in... | 01/05/1982 |
| 4301873 | Agricultural implement having field and transport modes A tandem offset disc implement comprising a frame on wheels, a tongue pivoted at the forward end of the frame for hitching the disc to a tractor, the frame being movable up and down, forward and rearward gangs of discs on opposite sides of the frame swing... | 11/24/1981 |
| 4274492 | Foldable device for transporting farm implements A device to provide for easy handling of dual tandem discs and similar farm implements. The device is a framework foldable on a hinge line and having wheels for transportation. The hinge line is longitudinal and provides that when collapsed, the two tande... | 06/23/1981 |
| 4137852 | Forwardly foldable toolbar A forwardly foldable agricultural planter includes a hitch shiftable as wing sectons are moved between transport and operational configurations. Rigid link tow bars pivot about centrally positioned pivots permitting the hitch to be horizontally shifted be... | 02/06/1979 |
| 4066274 | Tandem folding implement Tandemly disposed tool beams project laterally outwardly from opposite sides of the central tongue of the implement and may be swung horizontally between laterally widespread, working positions and folded back, compacted, transport positions. Collapsing l... | 01/03/1978 |
| 4002334 | Dual frame offset disc implement with tongue members and a tow bar arranged for movement between side by side relation and a trailing relation An earth working apparatus in the form of a dual frame offset disc implement includes first and second tongue members and a tow bar arranged for movement of first and second mobile frames between a side-by-side earth working position and a trailing relati... | 01/11/1977 |
