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 |
| 7451548 | Device and method for measuring the geometry of a wheel axle of a motor vehicle The invention relates to a device for measuring the geometry of a wheel axle of a motor vehicle, said device comprising a hub gripping element (20) for gripping and rotating a hub (50) of the wheel axle, and at least one measuring sensor (58). T... | 11/18/2008 |