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 |
| 7057799 | Tuning a narrow band filter for telecommunication applications with an acoustic optical tunable filter An optical tunable filter that includes a thin-film filter for band-passing at least two bands of wavelengths. The tunable filter further includes a tunable band-passing device tunable over the at least two bands for tuning to a tunable pass-band spectrally overlapp... | 06/06/2006 |
| 6930819 | Miniaturized external cavity laser (ECL) implemented with acoustic optical tunable filter An optical tunable laser design for the optical telecommunication industry is disclosed in this invention. This new design is economical, reliable, robust and with superior optical performances. The design offers broadband tunability, high output power, narrow laser... | 08/16/2005 |
| 6822785 | Miniature, narrow band, non-collinear acoustic optical tunable filter for telecom applications This invention includes an Acousto-optical tuning device by employing the TeO2 in share mode, non-collinear and in high RF frequency (or large Bragg's deflection region), it is able to achieve the telecomm worthy tunable filter that provides high tuning speed, no-mo... | 11/23/2004 |