Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7392854 | Front rotary working machine A front rotary working machine is provided which has rotary working portions disposed at a front portion of a transmission case, and a front wheel disposed forward of the rotary working portions. The working machine includes a guard member extending forward from the... | 07/01/2008 |
| 5095997 | Floating track erasers A system for uniformly erasing soil indentations made by the wheels of agricultural equipment. The erasing elements are pulled behind the wheels of the agricultural equipment and are pivotally attached to the frame thereof thereby preventing the relative ... | 03/17/1992 |
| 4909334 | Machine for filling ruts in agricultural fields An agricultural machine for smoothing ruts, such as are produced in a field by center pivot sprinkler irrigation systems, comprises a pair of rotary tillers arranged in a unique frame for traveling over and along respectively opposite sides of the rut as ... | 03/20/1990 |
| 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 |
| 4406329 | Agricultural tool cart for minimum tillage and seed planting An agricultural tool cart having structure for towing a three-point hitch seed planter behind minimum tillage tools for tilling and planting in one pass through a field, the cart being equipped with hydraulic operated wheels for transport of both minimum ... | 09/27/1983 |
| 4308921 | Ground track obliterating device A track obliterating device is disclosed that is particularly useful for obliterating the tracks on the ground made by a chemical applicator wagon. The device includes a mounting frame upon which a plurality of ground engageable track obliterating element... | 01/05/1982 |
| 4262752 | Ground wheel and plowing implement connected thereto for filling wheel tracks A plowing implement is disclosed for following and filling wheel tracks created, for example, behind a pair of sprinkler wheel tires, particularly arrangements in which each tire repeatedly traverses the same fixed path. When the track created by the tire... | 04/21/1981 |
| 4237985 | Track removing device A device that includes a bracket, a hydraulic cylinder having an end pivotally mounted on an axis of the bracket, a first link pivotally mounted on the bracket on one side of the cylinder and pivotally connected to the extension end of the cylinder, a sup... | 12/09/1980 |
| 4228861 | Folding track removing implement A folding implement mountable on the three-point hitch of a tractor has a U-shaped, downwardly oriented, central member with a horizontal wing extending laterally from each side of the central member, behind the rear wheels of the tractor. Each horizontal... | 10/21/1980 |
| 4210210 | Quick mounting mechanism for agricultural implement A mechanism for quickly and independently mounting detachable soil engaging tools on mobile agriculture equipment includes a vertically extending frame member and a pivotal tool support member. The frame member and tool support member have a tool mounted ... | 07/01/1980 |
| 4209068 | Track closing attachment for a mobile ground irrigation tower An attachment for a mobile ground irrigation tower including a pivotal arm which supports a pair of spaced downwardly biased disks that serve to close the track formed by the tower wheel in the ground. The horizontal spacing of the disks may be varied to ... | 06/24/1980 |
| 4204579 | Cultivator with pivotal tines A cultivator has a frame normally carried on the back of a tractor and pulled in a predetermined direction along the ground. A plurality of tines extend downwardly from this cultivator and penetrate the ground. Each tine is pivotal about a respective axis... | 05/27/1980 |
| 4195696 | Earthworking implement with open center frame section An earthworking implement mounted on a three point hitch of a tractor for tilling compacted soil behind the drive wheels of the tractor. The implement has a transverse main frame including an inverted U-shaped central section carrying outwardly extended b... | 04/01/1980 |
| 4193456 | Biased agricultural implement Apparatus for connecting soil engaging tools to mobile agricultural equipment includes a vertically extending frame adapted for connection to the agricultural equipment and a trailing arm pivotally attached to the frame and having soil engaging tools atta... | 03/18/1980 |
| 4192388 | Wheel rut closing device for irrigation system A wheel rut closing device for use in combination with an irrigation system having an irrigation line support or supports, each support having rotatably mounted thereon a wheel or wheels. The wheel rut closing device is mounted on each irrigation line sup... | 03/11/1980 |
| 4124079 | Driven implement connected to rockable motor of a vehicle A self-propelled tiller-planter including a motor providing hydraulic motive power for various operating mechanisms. A tiller pushed by said planter and hydraulic means is provided for lifting and lowering the tiller assembly into inoperative position abo... | 11/07/1978 |
| 4120365 | Track eliminator apparatus Track eliminator apparatus mountable on a tractor to be between the tractor and the grain box of a grain drill for breaking up the soil compacted by the tractor rear wheels. The track eliminator apparatus includes clamp members that are mounted on the tra... | 10/17/1978 |
| 4079788 | Hand-pushable tilling device A hand-pushable, tilling device includes a main frame carrying ground-engaging front and rear wheels, handle means on the frame and a selection of tilling tools, including at least a furrow-forming tool and a cultivating tool, each having a shank portion ... | 03/21/1978 |
| 4033417 | Agricultural machine A support is connectable with an agricultural machine, and a plurality of agricultural tools is provided which are mounted by mounting elements on the support so that they can be adjusted relative to the support. A single arresting element is provided whi... | 07/05/1977 |
| 3998275 | Earthworking implement and row guide apparatus An earthworking implement mounted on a three-point hitch of a draft vehicle with a hitch assembly. The hitch assembly has L-shaped members mounted in clamps secured to a main transverse beam. A plurality of parallel linkages movably connect a transverse t... | 12/21/1976 |
