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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 |
| 7964704 | Preparation of high purity collagen A method of preparing collagen by first producing a collagen matrix and then extracting collagen from the matrix. ... | 06/21/2011 |
| 7950624 | Water valve apparatus A water valve apparatus includes a housing and a control valve stem. The housing has a spacer to divide the interior space and a base with a plurality of water outlets formed thereon. The spacer has a first opening. The base has a second opening corresponding to the... | 05/31/2011 |
| 7771090 | Heat-dissipation structure An improved heat-dissipation structure includes a heat-dissipation lamp frame which comprises: a heat-dissipation structure and a plurality of heat-dissipation lamp sets. The heat-dissipation structure has a plurality of heat-dissipation fins on one side thereof, an... | 08/10/2010 |
| D616978 | Condom | 06/01/2010 |
| 7434535 | Timing device A timing device for visually determining the passage of a preselected period of time including a redox indicator and a metal salt wherein the indicator undergoes an observable change in color which is related to the desired preselected period of time. ... | 10/14/2008 |
| 7435380 | Pseudo-plastic or thixotropic liquid deodorant product for ostomy pouches A pseudo-plastic or thixotropic carrier having anti-malodorous components dissolved or suspended therein is sprayed on the internal surfaces of an ostomy bag or pouch. The viscoelastic properties of the carrier allow the composition to be conveniently dispensed from... | 10/14/2008 |
| 7419647 | Hydrothermally stable Ag-zeolite traps for small olefin hydrocarbon molecules A hydrocarbon trap comprises an Ag-zeolite which is heated by a unique steaming regimen. ... | 09/02/2008 |
| 7255841 | Sodium bicarbonate production method A method of producing sodium bicarbonate having a high degree of purity and obtaining a net reduction in effluent waste water, as compared to prior processes, when starting from trona ore is disclosed. The process entails utilizing the waste-water effluent stream fr... | 08/14/2007 |
| D548359 | Diagnostic test device with removable overcap | 08/07/2007 |
| 7156456 | Foldable chair A foldable chair has a supporting shaft assembly, a frame assembly, a connecting shaft assembly and a cushion mounted on the frame. The supporting shaft assembly has two parallel rockers connected by multiple transverse shafts and four curved shafts rotatably mounte... | 01/02/2007 |
| 7140677 | Ball chair A ball chair has a seat, a backrest assembly and a ball cushion. The seat has a top face, a passage defined in the top surface of the seat, at least three legs formed on the seat and each leg and a supporting base formed on seat. The backrest assembly mounted on the... | 11/28/2006 |
| 7137995 | Breast implant injector and method of use A breast implant injector device comprising a hollow guide cylinder having an open injection end and an opposed filling end, the cylinder having an elongated slot extending from the injection end toward the filling end, and an elongated plunger which can be pushed t... | 11/21/2006 |
| 7135163 | Prevention of crystal formation in toothpaste In dentifrices containing sodium bicarbonate and anionic species which can react with sodium and water to precipitate hydrated crystals, the ratio of water to humectants, abrasives, and/or thickeners is adjusted so that the dentifrice has a water activity of no grea... | 11/14/2006 |
