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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7354254 | Compact vacuum pump A compact turbomolecular vacuum pump (1) is driven by a cup-type motor (8). The cup-shaped rotor of the motor is preferably integrated into the pump rotor (14) and may define corresponding pumping stages, for instance Holweck stages, wherein the... | 04/08/2008 |
| 7334481 | Pressure sensor with improved vibrating microassembly and optical detection system A pressure sensor made of a wafer with a pair of parallel silicon layers and a silicon oxide layer there between, comprises a vibrating microassembly formed as a silicon beam, which is arranged in a plane perpendicular to the silicon layers and fastened to a support... | 02/26/2008 |
