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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 607/72 - Pulse signal


Subclass of Class 607 - Surgery: light, thermal, and electrical application
Definition: Subject matter for generating a stimulus having a single component which
No. of patents: 322
Last issue date: 05/08/2012


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