...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 |
| 6525089 | Pharmaceutical composition containing decursin A pharmaceutical composition comprising decursin and its uses as a nephrotoxicity inhibitor, an antineoplastic agent, an antidiabetic agent, and as a cancer-cell differentiation induction agent are disclosed.... | 02/25/2003 |