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 |
| 5381911 | Child-resistant container closure A child-resistant closure for a container includes a cap constructed and dimensioned such that it can be gripped and moved to open the container by the hand of the size of an adult but not of a child.... | 01/17/1995 |