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 |
| 5558581 | Fairground device A fairground device has a base disc driven for rotation about a central axis, seat supports carried by the base disc in a spaced relation relative to the central axis for rotation of the seat supports about a second axis, and seats mounted eccentrically r... | 09/24/1996 |
| 5395290 | Fairground device A fairground device having a plurality of seats, a base disc driven for rotation about a central axis and at least one seat support mounted in spaced relation relative to the central axis for rotation about a second axis. Each of the seat supports carry a... | 03/07/1995 |
| 4988089 | Fairground attraction A fairground attraction transportable in parts, comprising two or more parts transportable in folded condition on separate carriages or containers. The carriages are provided with means for lateral and longitudinal displacement.... | 01/29/1991 |
| 4735545 | Boat cradle A boat cradle for supporting boats, comprising a frame supported on legs and carrying support arms of adjustable length that extend upwards from said frame. According to the invention, the frame is supported on three leg structures.... | 04/05/1988 |