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| Number | Title | Issue Date |
| 7220081 | Concentric load bearing piping with liner for foundation anchor An apparatus and process for increasing the concentric bearing load capabilities of the length of liner is disclosed. Overlapping ends of vertically aligned pipe lengths are joined by a coupling which provides aligned throughholes through the respective pipe ends. A... | 05/22/2007 |
| 4716665 | Folding trencher boom A foldable trencher boom assembly including a first boom portion pivotally connected to a second boom portion by a hinge. One leg of the hinge is connected to the first boom portion while the other leg of the hinge is connected to the second boom portion.... | 01/05/1988 |
| 4626032 | Rock ditcher Apparatus for excavating hard soils comprising support means, an endless chain capable of movement relative to said support means, drive means for moving said endless chain, means integral with said endless chain operable to contact said hard soils, and m... | 12/02/1986 |
| 4491183 | Retractable in-row tiller device A retractable in-row tiller device is adapted for mounting on a movable vehicle and for tilling the ground around and between objects in a row. An outrigger arm with a rotary tiller mounted on its distal end is retracted inwardly and extended outwardly by... | 01/01/1985 |
| 4429477 | Portable ditcher and excavating elements therefor The disclosure is primarily directed to the reduction of excavating tooth and chain drag which makes possible the manual transport and manual propulsion of a ditcher through the earth to commercially acceptable specifications.... | 02/07/1984 |
| 4100861 | Soil stabilizing apparatus An apparatus for injecting soil stabilizing materials into the ground along endless paths which are substantially transverse to the forward movement of the apparatus over the ground.... | 07/18/1978 |
| 4063523 | Soil stabilizing apparatus A method and apparatus for stabilizing the soil, wherein materials are injected into the soil in closed paths along substantially straight lines.... | 12/20/1977 |
| 4051903 | Soil cultivating machines A cultivating machine has one or more working members that are driven to rotate about upwardly extending axes. Each working member is connected to a drive transmission to turn and, spaced apart soil working members mounted for free rotation about respecti... | 10/04/1977 |
| 4050519 | Soil cultivating machines A soil cultivating machine has soil working members that are driven about upwardly extending axes. Each working member has radial arms and a tined cultivating rotor is pivotably connected to the outer end of each arm. Each cultivating rotor is freely rota... | 09/27/1977 |
| 4042042 | Soil cultivating machines A soil cultivating machine has a frame beam with a forward supporting member and a rear supporting member. The frame beam and the supporting members are all elongated and extend transverse to the direction of travel. The opposite lateral ends of one suppo... | 08/16/1977 |
