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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 400/518.1 - Plural carriers disposed side-by-side for selective use singly or simultaneously


Subclass of Class 400 - Typewriting machines
Definition: Subject matter wherein the typewriter is provided with two
No. of patents: 0


 
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