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William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7458377 | Method and apparatus for intra oral myofascial trigger point therapy A method is provided for relief of head, face and jaw pain by achieving the release of intra oral muscle spasms, trigger points, and myofascial dysfunction. The steps include locating intra oral treatment points, including locations of intra oral muscle spasms, trig... | 12/02/2008 |
| D581809 | Circular container with ridged lid | 12/02/2008 |
