U.S. patents available from 1976 to present.
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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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Class 217/83 - Hinged


Subclass of Class 217 - Wooden receptacles
Definition: Covers hinged to the chime or having two parts hinged together,
No. of patents: 0


 
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