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 |
| 7338247 | Quick release fastener A releasable fastener for releasably engaging a bolt body has a generally cylindrical sleeve member having an inner surface closely spaced from an outer surface of the bolt body. A latch member having a contact surface is mounted on the sleeve member for movement be... | 03/04/2008 |
| 4762452 | Attachment nut with anti-back up means An economical alternative to throw away lock nuts is provided by a retainer that fits to or over a conventionally threaded nut. Splines on the shaft, and resilient fingers on the retainer, are mismatched in number by one, assuring that they interfit with ... | 08/09/1988 |