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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 |
| 5877723 | System and method for determining an operating point System and method for determining an operating point of a mobile machine. The invention receives GPS information from a GPS and INU information from an inertial navigational unit. A plurality of error states are modeled. The operating point of the mobile ... | 03/02/1999 |
