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 |
| 7097154 | Extended length strand take up device An extended length strand take up device comprises at least two tension rods disposed in parallel spaced relationship to one another, and a first connecting body slidably mounted on the tension rods for connecting the extended length strand take up device to a guy w... | 08/29/2006 |