Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7033105 | Road paving equipment tire track remover A road paving equipment tire track remover having a pair of blade assemblies, each including a semi-flexible blade with a lower edge and an upper edge. The upper edge is affixed to and shaped by a V-shaped frame so as to create a concave front side of the blade. The... | 04/25/2006 |
| 6021853 | Field finishing land plane having retractable sections for road safety during towing A field finishing land plane has a V-shaped, horizontally oriented frame converging at a front end affixed pivotal to steerable rollers in a yoke fastened to a tow tongue. The pivotal front is housed in a protective shielding. A cross member that attaches... | 02/08/2000 |
| 5890546 | Tractor drawn scraper with folding wings A tractor drawn scraper apparatus with folding wings includes a main frame with a main blade assembly depending therefrom and wing frames with wing blade assemblies depending therefrom. The wing frames are pivotally connected to laterally opposite ends of... | 04/06/1999 |
| 5810097 | Attachment system for mounting road-maintenance equipment on a vehicle An attachment system for mounting road-maintenance equipment on a vehicle such as a motor grader includes a frame for mounting on the nose plate of the vehicle to support the conditioning equipment forwardly and partly outboard of the vehicle. The system ... | 09/22/1998 |
| 5538085 | Gauge wheel mounting A gauge wheel assembly includes a gauge wheel arm that straddles the rig tube and is supported on the tube by two bushings inserted through holes on either side of the tube. The bushings contact each other near the center of the tube to provide a solid or... | 07/23/1996 |
| 5499683 | Soil treating system with hydraulically actuated implement controller A soil treating system having a frame, a first implement to engage soil to effect treatment thereof and mounted to the frame in an operative position in which the implement can be moved vertically relative to the frame, and an hydraulic actuator acting be... | 03/19/1996 |
| 5497715 | Seed metering drive mechanism for seed planters and the like A metering drive mechanism is provided for use with a seed depositing implement adapted for movement across the ground. The mechanism includes a gauge wheel, an arm assembly supporting the gauge wheel for rolling engagement with the ground, and a mounting... | 03/12/1996 |
| 5462123 | Tillage implement with on-the-go depth control of angle adjustable disc gangs The working depth of obliquely angled disc gangs on the implement can be readily adjusted from the tractor seat with a single hydraulic cylinder through the use of mechanical linkage that couples the hydraulic cylinder with all of the disc gangs for simul... | 10/31/1995 |
| 5404958 | Lifting structure for an agricultural tractor An agricultural tractor includes an axle body and a vehicle substructure. A generally vertical lifting structure is rigidly attached to the vehicle substructure and engages a lifting frame which is adjustable in height. The lifting frame carries coupling ... | 04/11/1995 |
| 4333534 | Agricultural tool carrier Individual tool bars are mounted between upright guides of a horizontal rectangular frame. Rollers engaging the guides transmit longitudinal forces from the frame to the tool bars and allow the tool bars to move freely up and down. Ground working tools mo... | 06/08/1982 |
| 4239086 | Lifting mechanism with cam A relatively compact and lightweight planting and fertilizing apparatus is attached to a small garden tractor by a universal hitch which restricts lateral movement between the two. The apparatus is spring biased downwardly to assure firm contact with the ... | 12/16/1980 |
| 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 |
| 3955626 | Multi-row vineyard cultivator A multi-row vineyard cultivator for cultivating a plurality of generally parallel rows of grape vines simultaneously having a wheeled framework adapted to travel over the rows with first and second outriggers mounted on the framework extending from the fr... | 05/11/1976 |
