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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 |
| 7765615 | Chest protector in sports medicine A chest protector, in sports medicine, adapted for players of the athletic games, is light in weight and reasonably comfortable to wear. It will protect the heart and chest cavity area of players in such games as lacrosse, field hockey, and baseball. The chest prote... | 08/03/2010 |
| 7551952 | EEG electrode headset An improved electrode headset is provided for the acquisition of electroencephalographic (EEG) brain signals detected at the scalp of a human subject. The headset includes an elastic fabric cap having a chinstrap, which cap is fitted closely to the scalp. The cap ha... | 06/23/2009 |
| D533944 | Surgical scalpel | 12/19/2006 |
| 7080921 | Linear light using LEDs A lighting fixture provides a substantially uniform line of light (bar of light) for illumination or signage. It uses a linear array of LEDs (light-emitting diodes) which are relatively efficient, long-lasting and resistant to damage from vibration. The LEDs are arr... | 07/25/2006 |
| 7067987 | Electronic ballast with closed loop control using composite current and voltage feedback and method thereof An electronic control system especially for non-linear loads, such as high pressure sodium (HPS) lamps, includes an active power factor correction circuit (APFC). The system provides a power factor correction of above 0.95; total harmonic distortion (THD) below 5%; ... | 06/27/2006 |
| 6947790 | Neurocognitive function EEG measurement method and system An efficient, objective testing method and system for evaluating changes in mental function is described. The method and system are based on measuring an individual's behavioral responses and brain function during a brief cognitive test battery and passive control c... | 09/20/2005 |
| 6695525 | Metal curb installation system and method A straight steel curb for the steel curb faced concrete curb of a roadway has a vertical sidewall and a horizontal portion. Two sheet metal or plastic benches, which lie on the floor of the trench, are aligned relative to a string line. Each bench has a b... | 02/24/2004 |
| 6218395 | Centrally-acting beta-blockers and serotonin-enhancers for the treatment of anxiety disorders and adjustment disorders with anxiety A combination of medicines are administered daily for the relief of the symptoms of an Anxiety Disorder or an Adjustment Disorder With Anxiety. The combination comprises a centrally-acting beta-blocker which passes the brain blood barrier, preferably the ... | 04/17/2001 |
