Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6209657 | Forward folding tillage implement A forwardly folding tillage implement carries a number of ground engaging tools on a tool gang frame disposed to the rear of a carrier frame. A rockshaft is disposed between the carrier frame and the tool gang frame and is movable between four rotated pos... | 04/03/2001 |
| 6202756 | Forwardly folding agricultural planter An agricultural planter is provided with hydraulically operated devices to effect the folding and unfolding of the planter support structure between operative and transport configurations. The planter includes a telescopic hitch apparatus that lengthens a... | 03/20/2001 |
| 6192994 | Lift assist mechanism for a forwardly folding planting implement An agricultural implement, having a tool bar that is pivoted forwardly to initiate the conversion of the implement from a working position toward a transport position, including left and right wing members extending in opposing directions to respective di... | 02/27/2001 |
| 5398771 | Grain Drill A grain drill is disclosed having a folding frame for parallel operation and a parallel link system that controls the tension to earth openers in order to produce relatively constant downward pressure for the openers. The grain drill includes a rotating t... | 03/21/1995 |
| 5394945 | Precision weeding machine for row crops The machine includes a frame adapted to move along spaced ridges planted with crop plants, frame support runners engaging the furrows between the ridges, a pair of transverse rows of weeding implements carried by the frame for movement along the ridges an... | 03/07/1995 |
| 5143160 | Chain harrow carts A cart or "caddy" is provided for operation and transport of one or more chain harrows, the cart consisting of a frame running on a pair of road wheels. Different harrow mountings can be mounted on the frame, all of which include a draw bar to which the h... | 09/01/1992 |
| 4893682 | Rotating flexible implement for soil erosion control An agricultural implement having a mobile mounting frame for moving across an area to be treated, and a soil working assembly co-operating with the mounting frame. The soil working assembly includes a flexible chain of interconnected links, the chain bein... | 01/16/1990 |
| 4871030 | Farm implement having transport wheels and soil working rollers on rotating frame The farm implement drawbar is provided with a transverse frame which is pivotally mounted at the rear of the drawbar for movement between a working position and a transport position. The ground engaging rollers are mounted on the frame while separate tran... | 10/03/1989 |
| 4579178 | Grader attachment for tractors A grader attachment for tractors includes a support designed to be secured to the frame of the tractor intermediate the front and rear wheels and projecting laterally from the tractor. An arm is pivotally coupled intermediate its ends to the support for s... | 04/01/1986 |
| 4438710 | Seedling planter A twin row seedling planter is provided with a new mechanical system for ejecting seedlings into a cut in the ground made by a dibble after the dibble has cut to a selected depth. The planter also features an improved modular lay-out of planting beams, pa... | 03/27/1984 |
| 4416336 | Tool bar carrier with castering wheels A tool bar carrier for farming implements adapted to raise the tools carried by it and mounted on fully swiveling wheels. The bar is coupled flexibly and releasably to the pulling device, and the coupled wheels are capable of being locked in a straight fo... | 11/22/1983 |
| 4318445 | Side shift plow assembly An implement side shift assembly is disclosed for laterally shifting an earth-working implement relative to a tractor or the like. The side shift assembly includes a frame assembly having laterally extending upper and lower slide rails. An implement suppo... | 03/09/1982 |
| 4266617 | Tractor with full-floating tool bar A tractor having a frame supported by ground-engaging drive wheels, a tool bar carried by the tractor and on which various implements may be mounted, the tool bar being universally mounted on the frame whereby the implement may be raised above or lowered ... | 05/12/1981 |
