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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 |
| 7237990 | Surgical tool system with quick release coupling assembly A surgical tool system with a handpiece and a cutting accessory that has inner and outer hubs. The handpiece has a spring biased lock ring that abuts a complementary stop member integral with the accessory outer hub to hold the accessory to the handpiece. An RFID ch... | 07/03/2007 |
| 6733218 | High speed surgical instrument A high speed surgical instrument is designed with a clutch that automatically locks a cutter which is easily assembled and disassembled without moving parts. The clutch includes a pin and U-shaped pin that compliments a configured groove section at the proximal end ... | 05/11/2004 |
| 6604744 | Rapid load drill bit adapter A novel drill bit adapter includes a body portion, a cap portion, a spring-biased catch and a push button actuator. The cap portion includes a transverse aperture and cooperates with the body to define a longitudinal aperture and a catch-receiving cavity.... | 08/12/2003 |
| 5638729 | Boring bar holder with U-shaped clamping member A boring bar holder for use with a lathe has a massive metal block with a generally triangular cavity extending transversely across the block. Inside the cavity a pair of diagonally extending surfaces are defined by the inside of upper and lower walls whi... | 06/17/1997 |
| 4916867 | Drill bit sharpener The present invention provides a drill bit sharpening device, for use with a support carrying a rotatable grindstone and having pivot arm retaining means. The device comprises a drill bit jig having clamp means for releasably retaining a drill bit therein... | 04/17/1990 |
| 4553306 | Reciprocating saw offset blade holder A modification to an existing adapter for reciprocating saber saws which supports the saw blade on the top of the adapter for making "flush with" cuts along the intersection between floors and walls, the improvement providing a second mounting for the saw... | 11/19/1985 |
| 4054294 | Secure tool gripping chuck Rotary motion is converted to linear motion by multiple thread sets which cooperate to provide precise control of the amount of rotary motion thus converted. As applied to a precision positioning device for a tool, blade or other object, the thread sets a... | 10/18/1977 |
