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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 |
| 7262358 | Portable voice studio system and method A portable voice studio apparatus is provided. The apparatus includes a microphone, a music generation device, a processing unit, and a headphone. The processing unit is contained in a single housing. The processing unit is electrically coupled with the microphone a... | 08/28/2007 |
