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 |
| 4475602 | Roller equipped earthworking member An earth engaging instrumentality is equipped with wedge-like surfaces for displacement of earthen material. Rollers are rearwardly offset from the leading edge of the instrumentality and have chordal segments projecting outwardly beyond the diverging sur... | 10/09/1984 |
| 4409912 | Agronomic implement A cultivating implement include a soil working tool having an elongate substantially planar blade. The blade extends sidewardly and downwardly at an acute angle to the vertical so that its plane is substantially parallel to the direction of movement throu... | 10/18/1983 |
| 4364436 | Ploughs A plow is structured to wholly or partly invert a furrow slice during operation. The furrow slice is cut loose by a leading V-shaped blade and is both compressed, and deflected laterally towards a side wall of the frame by a plurality of rotary lateral di... | 12/21/1982 |
