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 |
| 5718234 | Physiological data communication system The present invention provides for a communication system for conveying biomedical data between a plurality of patient monitors and a centralized base station. The communication system includes a plurality of base transceivers within the base station. Eac... | 02/17/1998 |
| 5683179 | Apparatus and method for thermoluminescent quench detection for superconducting devices A quench detector for determining a conductive state in an energized superconductor, including a thermoluminescent quenching sensor in thermal contact with the superconductor and producing a quenching signal corresponding to the conductive state; and a si... | 11/04/1997 |