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| Number | Title | Issue Date |
| 4592429 | Roll-over variable width plow A two-way gang plow is provided with a pair of front steering wheels muonted for steering adjustment relative to a pivoted front axle. The steering mechanism for the wheels is coupled to a steerable tail wheel through master and slave hydraulic cylinders ... | 06/03/1986 |
| 4326593 | Reversible ploughs A reversible plough has a headstock formed from upper and lower parts hingedly connected about a transverse axis, the reversing spindle being mounted in the lower headstock part and carrying a crank arm connected by a link to the upper headstock part. As ... | 04/27/1982 |
