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 |
| 4869507 | Golf club A weighting system for wood golf club heads comprising first, second and third weight receiving sockets and at least one set of removable and interchangeable weights receivable in the sockets. The first and third sockets are disposed in the heel and toe p... | 09/26/1989 |