U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 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 171/108 - TRACTION WHEEL DRIVE DETAILS FOR UNEARTHING UNIT PART


Subclass of Class 171 - Unearthing plants or buried objects
Definition: Apparatus having claimed specific details of a power transmission
No. of patents: 0


 
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