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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 |
| 6707388 | Circuit for the controlled return of a pointer driven by a stepping motor in the event of failure of the supply voltage A circuit arrangement for the controlled return of a pointer driven by a stepping motor in the event of failure of the supply voltage includes a control circuit for actuating the stepping motor. The supply voltage at least for the control circuit for the stepping mo... | 03/16/2004 |
| 6028582 | Solenoid for scanned flip-disk sign improvements An improved solenoid and reset pin for a modular display apparatus for displaying indicia at a front thereof having a frame for rotationally mounting a plurality of pixels. Each pixel includes first and second display faces joined along respective adjacen... | 02/22/2000 |
| 4064502 | Positioning control system for alphanumeric displays A destination sign for buses is disclosed with an automatic positioning system for a plurality of sign modules. The sign is made up of plural modules, each of which is capable of displaying any one of a set of alphanumeric characters. The display of a mod... | 12/20/1977 |
| 4012623 | Counting and indicating system A fuel delivery pump having a resettable register for registering the volume and cost amounts of each fuel delivery and employing conventional resettable volume counters and new electromagnetic cost counters composed of banks of decade modules, each havin... | 03/15/1977 |
