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| Number | Title | Issue Date |
| 4605072 | Soil cultivating apparatus Soil cultivating apparatus is provided including a cultivating tool for entering into the soil, and control means responsive to the force exerted on said tool by an obstacle encountered by said tool as the tool is drawn through the soil to lift the tool o... | 08/12/1986 |
| 4601347 | Automatic reversible wheel track filler A direction of movement sensing apparatus is shiftably supported from the wheel track filling structure of a wheeled support tower for an irrigation pipe and is operative to shift between a first inoperative position assumed thereby when the tower is movi... | 07/22/1986 |
