Famous Patents
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 |
| 6892589 | Proof testing method and apparatus for optical fibres The invention relates to a proof testing method and a proof testing apparatus for optical fibre where a fibre (1) is guided to a first pulling device (2) and further to a second pulling device (3) and then onto a reel (11, 12), whereby th... | 05/17/2005 |
| 6619136 | Method for measuring stress in a structural element Displacement measuring means are fixed onto the structural element. A hole is drilled in the measurement zone and a supply pressure is applied to a flat actuator introduced into the hole. The displacements measured are analyzed as a function of the supply... | 09/16/2003 |
| 4864852 | Method and apparatus for measuring the cut resistance of flexible materials Method and apparatus for measuring the cut resistance of flexible materials, such as films, fabrics, felts and papers. A flexible material is wrapped around a mandrel that is rotated at a predetermined speed. A cam attached to the rotating mandrel allows ... | 09/12/1989 |
| 4537060 | Apparatus and method for multiaxial impact testing of materials A sample of material is tested by rupture with an impact member, relative movement of the sample and member being maintained at a substantially constant velocity along a straight line before and after impact and being derived from angular movement of a ca... | 08/27/1985 |
