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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 |
| 7291502 | Method for performing a non-invasive blood gas test A non-invasive blood gas test is carried out by a method that utilizes a venous blood sample together with a pulse oximeter and a plurality of mathematical equations. The method generates the following data points of the blood: (i) the pH level; (ii) the [H+] concen... | 11/06/2007 |
| 6981507 | Child's barrette and method of application Fine or short hair is held in place by a barrette having a fastener material known as Velcro®, comprising hook and loop portions. The barrette comprises a flat strip of flexible material having a decorative upper surface and a lower surface. One end of the strip's ... | 01/03/2006 |
