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 |
| 6591428 | Helmet fitting system A fit system positionable adjacent interior portions of a helmet and cranial surfaces of a cranium of a wearer of the helmet proximate the interior portions of the helmet for improving the fit of the helmet to the cranium. The system includes an elongate ... | 07/15/2003 |
| 6530092 | Fitting and comfort system with inflatable liner for helmet An inflatable liner for a helmet. The liner has a first elongated cell and a second elongated cell extending substantially parallel to the first elongated cell. Passages extend through the first divider to permit air to pass between the first and second c... | 03/11/2003 |
| 6497012 | Buckle A buckle for receiving a strap member and for snap-fitting to a snap stud located on a helmet. The buckle includes a metal member having opposite ends, with an aperture located between the ends and a slit on either side of the aperture. Each of the slits ... | 12/24/2002 |
| 6481066 | Buckle A buckle for receiving a strap member and for snap-fitting to a snap stud located on a helmet. In a preferred embodiment, the buckle includes a metal member having opposite ends, with an aperture located between the ends and a slit on either side of the a... | 11/19/2002 |
| 6434755 | Helmet A helmet which includes a substantially rigid shell having a shell thickness defined by a substantially continuous exterior surface spaced apart from a substantially continuous interior surface. A one-piece first shock attenuating member is positioned adj... | 08/20/2002 |
| 6371710 | Attachment system An attachment system including an attachment member having a height and a width with a base and a main body having a height extending away from the base and being substantially flexible along the height thereof and substantially inflexible along its width... | 04/16/2002 |
| 6370699 | Jaw pad for helmet A pad including a member provided by a substantially rigid sheet material having a crease formed therein to define first and second member portions that are yieldably positionable relative to one another about the crease and within a defined range of moti... | 04/16/2002 |
| 6351853 | Helmet fitting system A fit system positionable adjacent interior portions of a helmet and cranial surfaces of a cranium of a wearer of the helmet proximate the interior portions of the helmet for improving the fit of the helmet to the cranium. The system includes an elongate ... | 03/05/2002 |