William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7413029 | Screw fastening machine The present invention aims to provide a screw fastening machine for reliably switching and changing a driving force transmitting path with the seating on a work as a reference. According to the screw fastening machine in which a first pulley is connected to a... | 08/19/2008 |
| 5667490 | Ablation device drive assembly including catheter connector A drive assembly for an ablation device. The drive assembly including a housing and a connector for coupling a catheter assembly including a rotatable drive shaft to the housing. The connector including a first coupling rotatably connected to the housing ... | 09/16/1997 |
| 5231902 | Pneumatically operated screw driver A pneumatically operated screw driver having a pneumatically operated rotor rotatably supported in an outer frame. The rotor is only rotatable about its axis. A moving unit is slidably disposed within the rotor. The moving unit has an upper piston and is ... | 08/03/1993 |
| 4822264 | Reversible twin-chambered compressed-air motor In reversible compressed air rotary motors for compressed air tools, particularly for wrenches, it is known to discharge the waste air radially from the casing of the motor, which results in a considerable nuisance, in particular as regards noise. Further... | 04/18/1989 |