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 |
| 6386795 | System for stabilization of sandy shores To battle the problem of sand loss due to wind action on a sandy shore a system is used which pumps water from the nearby water volume and makes the sand wet depending on wind speed and/or other conditions such as rain, moistness of the sand, wind directi... | 05/14/2002 |