Did You Know...
...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 |
| 6420035 | Metal material subjected to treatment for seizure prevention and method for production thereof A metal material subjected to a treatment for seizure prevention is provided. The metal material includes a metal base material and a film formed thereon, the film being composed of a carbodiimide group-containing resin obtained from an aromatic polyisocy... | 07/16/2002 |
