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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 |
| 7074486 | Glazing with optical and/or energetic properties capable of being electrically controlled The subject of the invention is glazing which incorporates at least one electrically controllable system having variable optical and/or energy properties, especially in the form of a system comprising one or more reversible-insertion materials of the electrochromic-... | 07/11/2006 |
| 6746775 | Glazing with optical and/or energetic properties capable of being electrically controlled The subject of the invention is glazing which incorporates at least one electrically controllable system having variable optical and/or energy properties, especially in the form of a system comprising one or more reversible-insertion materials of the electrochromic-... | 06/08/2004 |
| 4711439 | Vice jaw support apparatus A vice jaw support apparatus provides a novel support system for securement of splined and threaded work pieces within vice grippers or jaws. In a preferred form, the apparatus is formed of a polyethylene or other similar resilient material. In a preferre... | 12/08/1987 |
| 4522098 | Saw guide A guide to be clamped on a door or similar object to guide a portable circular saw to insure accurate cuts. The guide has an elongated, rigid member having a block pivotally attached at one end. The object to be cut with the saw is clamped between that bl... | 06/11/1985 |
| 4277073 | Insert type soft chuck jaws A soft chuck jaw comprising a hardened jaw body having a wedge locking means thereon and an insert of soft expendable material retained therein.... | 07/07/1981 |
