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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8059436 | Modular power converters usable alone or in a multiphase power converter A power converter module for use alone or with other modules in a multiphase power converter. The power converter module has an enclosure that surrounds internal components to prevent radiation of electromagnetic energy, which internal components also limit conducti... | 11/15/2011 |
| 7939957 | Water turbine system and method of operation A system for providing electrical power from a current turbine is provided. The system includes a floatation device and a mooring. A water turbine structure is provided having an upper and lower portion wherein the lower portion includes a water fillable chamber. A ... | 05/10/2011 |
| 7891941 | Wind turbine having a direct-drive drivetrain A wind turbine comprising an electrical generator that includes a rotor assembly. A wind rotor that includes a wind rotor hub is directly coupled to the rotor assembly via a simplified connection. The wind rotor and generator rotor assembly are rotatably mounted on ... | 02/22/2011 |
| 7737570 | Water turbine system and method of operation A system for providing electrical power from a current turbine is provided. The system includes a floatation device and a mooring. A water turbine structure is provided having an upper and lower portion wherein the lower portion includes a water fillable chamber. A ... | 06/15/2010 |
| 7692938 | Multiphase power converters and multiphase power converting methods A new class of multiphase converters having at least two switching cells driven by out-of-phase PWM reference signals and corresponding respective PWM control signal signals. In some embodiments, once of the switching cells are driven as a function current-balancing... | 04/06/2010 |
| 7492617 | Frequency control and power balancing in disturbed power inverter system and method thereof A system and method are disclosed for controlling DC to AC power converters (inverters) that are operated as voltage sources and are paralleled on the AC side. This method allows for controlling frequency while sharing real power. The disclosed method requires no co... | 02/17/2009 |
| 7489046 | Water turbine system and method of operation A system for providing electrical power from a current turbine is provided. The system includes a floatation device and a mooring. A water turbine structure is provided having an upper and lower portion wherein the lower portion includes a water fillable chamber. A ... | 02/10/2009 |
| 7462955 | Electrical power distribution system and method thereof A system for providing auxiliary electrical power is provided. The system includes a plurality of loads and a plurality of power sources, each providing electrical power to one or more of the plurality of loads. At least one generator is electrically connected to th... | 12/09/2008 |
