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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 |
| 7222981 | EL display device and electronic device A cover member is adhered onto a substrate on which an EL element is formed with a filler as an adhesive. Further, a sealing member is provided so as to cover a side surface (an exposing surface) of the filler, and a frame member is adhered using the sealing member.... | 05/29/2007 |
| 4274477 | Radiator for low-pressure steam heating systems A radiator for low-pressure steam heating systems comprises at least two chambers, which constitute respective radiator elements. Consecutive elements are interconnected in an upper portion and in a lower portion. The upper portion of each element is conn... | 06/23/1981 |
