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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| Application No. | Application Title | Issue Date |
| 20090312626 | ARTICLES AND METHODS FOR IMPROVING MRI IMAGING Described herein are articles and methods for improving MRI imaging. The articles and methods augment fat saturation, which improves the resolution of the MRI image and ultimately provides more precise and accurate diagnosis of diseases.... | 12/17/2009 |