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| Application No. | Application Title | Issue Date |
| 20100279427 | Devices and Methods for Measuring the Acidity of Airborne Matter Using UV-Visible Spectrometry Devices and methods for measuring the acidity of airborne matter are provided. A filter can be impregnated with an indicator dye which changes color in response to changes in acidity. After the sample passes through the filter, the filter can be analyzed using UV-visibl... | 11/04/2010 |
