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 |
| 7515062 | Controller having reduced control key set and method for operating same in a learning, macro, or cloning mode In some embodiments, a wall-mountable, configurable controller having control keys (e.g., less than eight keys or another small number of keys), a subassembly including circuitry, and a control key insert removably mountable to the subassembly and including at least... | 04/07/2009 |
| 7334067 | Programmable controller having reduced control key set In some embodiments, a wall-mountable, programmable controller having control keys (e.g., less than eight keys or another small number of keys), a subassembly including circuitry, and a control key insert removably mountable to the subassembly and including at least... | 02/19/2008 |