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| Number | Title | Issue Date |
| 5627362 | Portable light source unit for simulating fires having an adjustable aperture A portable, hand held light source unit is employed to check operation of fire detectors, such as hydrogen fire detectors. The unit emits radiation in a narrow band of wavelengths which are generated by the type of fire to be tested, but not by other ligh... | 05/06/1997 |
| 5625342 | Plural-wavelength flame detector that discriminates between direct and reflected radiation A flame detector employs a plurality of wavelength selective radiation detectors and a digital signal processor programmed to analyze each of the detector signals, and determine whether radiation is received directly from a small flame source that warrant... | 04/29/1997 |
