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 |
| 20110011290 | SYSTEMS AND METHODS APPLYING A DESIGN ON A MEDIUM Disclosed herein are systems and methods for applying a design on a medium. In some embodiments, the system includes a letterpress assembly having a base and platen that may be configured in an open configuration and a closed configuration. In the open configuration, th... | 01/20/2011 |