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| Number | Title | Issue Date |
| 4265186 | Grain drill with oscillating planter bar An apparatus and a method for planting seed are disclosed. The apparatus comprises frame carried by a plurality of ground engaging wheels. Carried on the frame is a means for raising and lowering the frame with respect to the ground. A planter bar having ... | 05/05/1981 |
| 3937460 | Combinations of two soil cultivating implements Two cultivators, in combination, form an assembly with a first implement having fixed soil penetrating members and a second cultivator has rotatary soil working members with tines that intensely work the soil broken by the first cultivator. Each cultivato... | 02/10/1976 |
