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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 |
| 6800251 | Sample handling system A particle suspension handling system comprises a dispersion unit, a transport element, a cell and an outlet region. The dispersion unit has a transducer externally thereof, which is arranged, in use, to transfer energy into the suspension. The transport element is ... | 10/05/2004 |
| 6778271 | Measurement of particle size distribution A particle size distribution analysis apparatus comprising a sample measurement zone adapted to define a sample of particles, a light emitting means adapted to provide a source of light incident upon the sample measurement zone, and at least a first detection means ... | 08/17/2004 |
| 6286376 | Sampling of a mixture to be analyzed for particle size/particle size distribution A particle size distribution analysis sample dilution apparatus in which a sample consisting of a batch of a slurry of particles is deposited on an inclined plate of a progressive sample delivery system from which a continuous supply of water progressivel... | 09/11/2001 |
