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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 |
| 6150659 | Digital multi-frequency infrared flame detector A flame detector consisting of a first infrared radiation detector for detecting radiation from combustion of hydrocarbon and other carbon containing compounds in conjunction with a second infrared radiation detector for distinguishing radiation from othe... | 11/21/2000 |
| 5937077 | Imaging flame detection system An imaging flame detection system for detecting flames of fires against false alarms using continuous imaging and pattern recognition of infrared (IR) images of a protected area under surveillance by the system. The system uses a Silicon (Si) Charge-Coupl... | 08/10/1999 |
| 5936250 | Ultraviolet toxic gas point detector Apparatus for the optical detection of selected toxic gases, using the ultraviolet region of the electromagnetic spectrum, and the known absorption properties of the toxic gases in the ultraviolet region. An ultraviolet flashlamp source illuminates a stra... | 08/10/1999 |
| 5914489 | Continuous optical path monitoring of optical flame and radiation detectors Apparatus for the optical detection of flames or explosions, having an optical structure to perform continuous optical path monitoring of the optical window receiving the optical radiation, to ensure against the buildup of radiation absorbing or scatterin... | 06/22/1999 |
