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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 |
| 3969104 | Granules of magnesium and its alloys The invention relates to magnesium-containing mixtures, in the form of granules of a particular shape, made by the introduction of a salt to liquid metal at a temperature of 670°-720°C, heated to a temperature of 670°-730°C, composed of metal chloride... | 07/13/1976 |
