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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 |
| 7282017 | Tool-switching device Tool-switching device for a machine for measuring coordinates wherein the tool is fastened on the tool-carrier and held by the action of elements exerting an axial force. The locking force is taken over symmetrically by the elements of a Boys connection, which incre... | 10/16/2007 |
| 6430828 | Coordinate positioning apparatus with indexable stylus, components thereof, and method of using it A stylus is supported by an upper coupling member which is supported by a lower coupling member which is supported by a probe which is movably supported by a rail of a coordinate positioning machine. The coupling members are held together by a permanent m... | 08/13/2002 |
| 5203091 | Caliper apparatus A caliper arrangement includes a first leg member pivotally mounted to a second leg member. The first leg member includes a C-shaped first leg in confronting relationship in a coplanar orientation relative to a C-shaped second leg. The pivot axle pivotall... | 04/20/1993 |
| 4815881 | Multi-purpose combination writing instrument A multi-purpose combination writing instrument which has an elongated core member with a hexagon cross section received in a correspondingly shaped pen tube consisting of a right and left members which can be converted into a compass after removing the co... | 03/28/1989 |
