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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 |
| 7263912 | Flywheel hub-to-rim coupling A flywheel system includes an annular rim mounted for high speed rotation on a flywheel hub. The hub has a radially splined exterior surface facing radially outwards. The rim includes an annular rim liner having an axis of rotation coinciding with the axis of rotati... | 09/04/2007 |
| 5124605 | Flywheel-based energy storage methods and apparatus Flywheel-based energy storage devices, with methods for their use and fabrication. The devices have the capacity to store electric energy as kinetic energy and to generate electric energy from the stored kinetic energy. Preferred devices comprise a pair o... | 06/23/1992 |
| 4026342 | Spring wheel having an overload stop A wheel comprising a hub element, a rim element, a plurality of substantially circular bands of flexible material spaced about the hub element interposed between and bearing against both of the elements, the axes of the bands being parallel to the axes of... | 05/31/1977 |
