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 |
| 6585709 | Apparatus and method for patient care and cleaning An apparatus and method for patient care and cleaning. Included are semi-disposable pants, a mattress, a care materials inflow preparation unit, a waste fluid container, a control unit, and a remote control device. The body area to be washed is covered wi... | 07/01/2003 |