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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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| Number | Title | Issue Date |
| 8207471 | Method for measuring phase boundaries of a material during machining with a machining beam using additional illumination radiation and an automated image processing algorithm, and associated device The present invention relates to a method for measuring phase boundaries of a material during the machining of a workpiece (12) with a machining beam, more preferably with a laser beam, and a device that is embodied in such a way as to carry out the method. A... | 06/26/2012 |
| 7176408 | Method for laser-cutting structural components to be joined In a method for cutting structural components to be joined by laser radiation that is guided by a computer-controlled manipulation system provided with a nominal path for each structural component corresponding to a joining line that is curved as a result of at leas... | 02/13/2007 |
| 6822188 | Method for shaping materials with plasma-inducing high-energy radiation A method for materials processing by means of plasma-inducing high-energy radiation, especially laser radiation, in which the instantaneous intensity of the plasma radiation is measured at plural locations of a vapor capillary. So that the method can also be perform... | 11/23/2004 |
| 6791057 | Method and device for machining workpieces using high-energy radiation A method for processing workpieces by means of high-energy radiation, wherein the radiation is focused by a processing optic onto a processing site. The light radiation emanating form the workpiece is received by the same processing optic and is analyzed by a detect... | 09/14/2004 |
| 5869805 | Method and device for working materials using plasma-inducing laser radiation A process for material working with plasma induced by high-energy radiati especially laser radiation, in which the radiation originating from the region of the workpiece is observed along the axis of the laser radiation focused along the axis on the work... | 02/09/1999 |
| 5486677 | Method of and apparatus for machining workpieces with a laser beam A method of machining workpieces with a laser beam wherein the machining cess, in particular the melting depth or the through-melting distance is monitored by detecting an optical and/or acoustical signal created by an unshielded laser-induced plasma or ... | 01/23/1996 |
| 5373135 | Process and an arrangement for treating workpiece by means of laser radiation A process for treating workpieces by means of laser radiation, particularly or the cutting, hole burning and material removal with respect to metallic workpieces, in which the treated site of the workpiece is monitored by a radiation detector which contrib... | 12/13/1994 |
