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 |
| 7001103 | Device for producing tactile-detectable warning surfaces and method for employing same Disclosed is a stamp for forming a tactile-detectable warning surface in moldable concrete or asphalt and method for employing same. The stamp consists of a mold member having truncated dome shaped indentations distributed therein in a warning pattern, each indentat... | 02/21/2006 |
