...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 |
| 6820082 | Rule based database security system and method A rule-based database security system and method are disclosed. A method for processing requests from a user to perform an action with respect to data stored in an electronic database includes defining a plurality of user defined rules containing security constraint... | 11/16/2004 |