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 |
| 7226051 | Sheet feeder In a sheet feeder of the present invention, a groove-shaped concave provided on an inner surface of a bearing extends therethrough in a direction where a rotational shaft of a feed roller extends. A surface of the rotational shaft of the feed roller is supported on ... | 06/05/2007 |
| 7044289 | Screw conveyor for the transport of flowable substances and/or lumps of material A screw conveyor for the transport of flowable substances and/or lumps of material comprises a rotatable first screw (1) provided with helical windings (2) arranged in a housing (3) with an inlet opening and an outlet opening. The housing (3 | 05/16/2006 |
| 5709482 | Integrated hanger bearing A hangar bearing is designed to be employed in a drying oven, generally known as a "tunnel" type, which is used to dry plywood, veneer board, fiber, or gypsum board. The hanger bearing main body support is made from a pair of identical stamped forms or fa... | 01/20/1998 |
| 5426931 | Bearing setup for an open-end spinning rotor A bearing setup is provided for the supporting disks of an open-end spinning machine, the supporting disks being supportively fixed on the ends of a shaft extending through a bearing sleeve of a supporting disk bearing. The bearing setup includes a fasten... | 06/27/1995 |
| 4761949 | Thrust reverser position indicator shaft bearing assembly A bearing assembly is disclosed for supporting the downstream end of a shaft for a position indicating system for a turbofan thrust reverser. The bearing assembly has a pair of support arms supporting a bushing which is attached to the downstream end of t... | 08/09/1988 |
| 4426163 | Bearing support arrangement for electrical machines A bearing support arrangement for electrical machines is made double-walled and box-like and has, between the two walls, reinforcements and supports for the bearings, the bearing support arrangement extending approximately up to the axial center plane of ... | 01/17/1984 |
| 4220378 | Plate bearing A height adjustable bearing for the plates of flat roofs or the like consists of a base plate, a central cross member, and in each of four quadrants of the base plate a respective bearing pedestal, a pair of wedge-shaped blocks between the bearing pedesta... | 09/02/1980 |