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 |
| 5092723 | Engine clip bolt Bolt material is orbitally swaged into recesses in the clip while simultaneously swaging bolt material over the clip to develop a torsional interference lock and an axial interference lock, respectively between the clip and the bolt. The recesses are arc ... | 03/03/1992 |
| 4169569 | Base anchorage for heavy machinery In a base anchorage for heavy machinery, in particular converters, an anchoring plate is concreted into a base and is firmly connected with at least one bolt, whose end projecting out of the base is provided with a screw thread. The at least one bolt is p... | 10/02/1979 |
| 4161854 | Mounting disk for the fixation of loosely installed sealing sheets A mounting disk arrangement is provided for the fixation of loosely installed sealing sheets of a synthetic resin, wherein the mounting disk is attachable to a substrate, such as a substrate on a roof, for example a trapezoidal roof, by means of a screw p... | 07/24/1979 |
| 4099274 | Thermoplastic article having accessible wall cavities therein for reception and retention of securing means A nut retaining formation is made in the wall of a thermoplastic (metal or plastic) article, such as the flange of a floor drain fitting, by a one step die forming operation. The formation has a cavity in the intermediate thickness of the flange, the heig... | 07/11/1978 |