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| Number | Title | Issue Date |
| 6076289 | Scarifier machine with a shaking milling drum A scarifier machine has a milling drum partially enclosed in a protective sump which is suspended from the frame of the machine by a linkage assembly. The protective sump of the scarifier machine is connected to the frame of the machine by shaking members... | 06/20/2000 |
| 6003613 | Apparatus for aerating a ground layer The invention relates to an apparatus for aerating a ground layer including a frame movable along a ground surface and a number of substantially vertically placed aerating pins movable in and out of the ground layer. Each pin is engaged by a pivot arm mou... | 12/21/1999 |
| 5983533 | Scarifer machine with a shaking milling drum A scarifier machine has a milling drum partially enclosed in a protective sump which is suspended from the frame of the machine by a linkage assembly. An eccentric drive reciprocates the sump relative to the frame.... | 11/16/1999 |
| 5810092 | Implement for improving the hygroscopic properties of soil The invention relates to an implement for treating soil and, in particular, to an implement used to improve the hygroscopic properties of the soil by making holes in it using one or more tools mounted on an irregular, variable, quadrilateral jointed struc... | 09/22/1998 |
