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 |
| 7357684 | Control system for a linear propulsor array The invention comprises a method of using a scalable, configurable “propulsor” system to move and navigate a submersible device through a fluid medium. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continu... | 04/15/2008 |
| 7244151 | Linear propulsor with linear motion The invention comprises a scalable, configurable “propulsor” system. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continuous control surface that undulates in a working fluid. Each propulsor is driven and... | 07/17/2007 |
| 7204731 | Linear propulsor with radial motion The invention comprises a scalable, configurable “propulsor” system. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continuous control surface that undulates in a working fluid. Each propulsor is driven and... | 04/17/2007 |
| 7090548 | Method of using a linear propulsor array for propulsion and navigation The invention comprises a method of using a scalable, configurable “propulsor” system to move and navigate a submersible device through a fluid medium. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continu... | 08/15/2006 |
| 6383045 | Marker buoy A marker buoy is provided for use with a flexible line tied to a weighted sinker. The buoy includes a watertight, transparent dome assembly with an interior light source positioned therein. The dome assembly resides on a buoyant housing with a bottom aper... | 05/07/2002 |
| 6269500 | Mechanism for generating wave motion The present invention provides a wave generating apparatus for generating waves in for example beds, chairs and the like. In one aspect the device includes a motor driven crankshaft to which are attached several longitudinal beams. The beams mounted on th... | 08/07/2001 |
| 6029294 | Mechanism for generating wave motion The present invention provides a wave generating apparatus for generating waves in for example beds, chairs and the like. In one aspect the device includes a motor driven crankshaft to which are attached several longitudinal beams. The beams mounted on th... | 02/29/2000 |
| 5820342 | Fluid forcing device with a fluted roller drive A fluid forcing device comprising many rotatable slender elements that converts mechanical energy into fluid energy by mechanically arranging and maintaining, at all time, the rotatable slender elements in a predetermined wave form and by mechanically mov... | 10/13/1998 |
| 5611666 | Fluid forcing device A fluid forcing device comprising many rotatable slender elements that converts mechanical energy into fluid energy by mechanically arranging and maintaining, at all times, the rotatable slender elements in a pre-determined wave form and by mechanically m... | 03/18/1997 |
| 4129089 | Marine propulsion apparatus A marine propulsion apparatus including a flexible, elongated plate, with a flexible tube attached to each side of the plate, or a flexible plate through which fluid can be passed. In use, the plate is cantilevered to a boat. When water is passed through ... | 12/12/1978 |
| 3942465 | Vehicle adapted to be advanced in a fluid A vehicle adapted to be advanced in a fluid by deforming itself progressively along its length, the vehicle comprising a head containing a fluid compressor and a body connected to the head and having a flexible and deformable envelope. An assembly of long... | 03/09/1976 |