...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 |
| 6939246 | Golf swing training apparatus A top loop fits around the neck of a golfer. A bottom loop fits around the mid-section of the golfer. An intermediate section containing a breakaway unit connects the top loop to the bottom loop. If the golfer projects an acceptable swing, the breakaway unit does no... | 09/06/2005 |