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 |
| 7314344 | Substrate-transporting device The present invention relates to a substrate-transporting device, including a base, a substrate carrier unit and a shaft unit mounted between the base and the substrate carrier unit. The shaft unit has a supporting shaft and a shaft base to support and control rotat... | 01/01/2008 |
| 7275635 | Free flow conveyance system A free flow conveyance system includes a plurality of linear conveyance apparatuses each having a plurality of unit conveyors linearly arranged, and a pivot conveyance apparatus having a unit conveyor which is arranged between the linear conveyance apparatuses being... | 10/02/2007 |
| 4084715 | Lift truck with means to pivot mast and the fork carriage thereon A fork carriage attitude adjusting arrangement includes a mounting tower secured to and extending upwardly from the forward end of a longitudinally extending frame. A lever arrangement is pivotally attached to the mounting tower and has a hydraulic tilt m... | 04/18/1978 |
| 4047625 | Gravity roller conveyors A platform for supporting the load and adapted in use to be inclined to the horizontal at one angle at the infeed position and inclined to the horizontal at another angle at the discharge position; it is provided with an apparatus for changing the inclina... | 09/13/1977 |