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 |
| 6123626 | Laser putter system A laser putter system for a conventional putter golf club of the type having a club head with a golf ball striking face and an upper surface, a shaft connected to the upper surface of the club head and a grip on the shaft. The laser putter system comprise... | 09/26/2000 |
| 5468199 | Sliding-handgrip amusement apparatus A playground apparatus (10) for children to slide across while hanging by their hands is disclosed. The apparatus includes a support structure (12, 16, and 20) holding multiple rails (18), preferably five, horizontally above the ground and above the heads... | 11/21/1995 |
| 5232154 | Children's ride-on track Provided is a track of elongated sections which interlock together to form various desired shaped. Each section has a safety securement device consisting of a "T"-bar slot (12) in its center. A rigid "T"-bar (16) is connected with a hook-end-loop strip (1... | 08/03/1993 |
| 4948118 | Support apparatus for water exercise and therapy Apparatus for supporting a user in a pool of water for therapeutic or training purposes. An overhead unit having tracks which guide and support the wheels of a movable trolley is provided. A cable having one end attached to the trolley and one end connect... | 08/14/1990 |
| 4458675 | Roller type finger-pressure apparatus A cover over the screw shaft in a roller-type fingerpressure apparatus prevents clogging and is also provided with flanges to help guide the moving roller frame. The vertical extension of the rollers is enhanced by having the roller shafts vertically slid... | 07/10/1984 |
| 4445502 | Safety restraint system and inertial reel therefor In this system an inertial reel is mounted beneath a platform, which is carried by a pair of trucks that roll along an overhead rail which is fastened to the ceiling of a hospital corridor or the like. Two, adjustable, rigid handles project downwardly fro... | 05/01/1984 |
| 4340215 | Bearing and support In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common... | 07/20/1982 |
| 4204719 | Bearing and support In a bearing and support for use either as a bearing, per se, or as a bearinged support for other items and incorporating the bearing of this invention; the bearing includes at least a pair of rotatable members that rotate or counter-rotate about a common... | 05/27/1980 |
| 3985082 | Electric walker The ceiling of a room is provided with an overhead track along which a carriage can move. A vertical column extends from the carriage and terminates short of the floor in the room in a handle grip which may be held by a patient. Motors in the carriage ser... | 10/12/1976 |