Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 5070946 | Stone burying attachment for landscape machines A stone burying attachment for a finish grading landscape machine is disclosed wherein the attachment is optionally mounted to the frame of the machine to create a furrow immediately forwardly of the discharge side of the machine to permit a burying of st... | 12/10/1991 |
| 4759411 | Selective pivotal mounting arrangement for coulters A mounting arrangement for fertilizer coulters including a selective locking mechanism whereby, at the option of the operator, the coulter may be permitted to pivot about the coulter supporting shank or be locked in place.... | 07/26/1988 |
| 4574891 | Agricultural tool clamp A clamp arrangement is provided for mounting an agricultural tool to a tool bar or cross bar. The clamp includes an upper clamp plate and a lower plate which are bolted to the bar and slotted to receive a vertical support bar. The vertical support bar is ... | 03/11/1986 |
| 4489787 | Angled rolling knives and method of weeding For cutting the roots of weeds in agricultural fields, rolling knives in the form of flat, circular plates with sharp, peripheral edges are journaled to struts connected to a tool bar drafted in a direction of draft. The knives rotate about knife axes tha... | 12/25/1984 |
| 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 |
| 4187916 | Soil conditioning and seed bed preparing apparatus Soil conditioning apparatus is disclosed which has a front coulter assembly, preferably with a fluted coulter, for preparing a narrow path wider than the following subsoiler shank by cutting trash and breaking and slitting the topsoil. Following the front... | 02/12/1980 |
