Novel methods and devices are provided involving at least one chamber, at least one capillary, and at least one reagent involved in a system providing for a detectable signal. As appropriate, the devices provide for measuring a sample, mixing the sample with reagents, defining a flow path, and reading...http://www.google.ca/patents/US5140161?utm_source=gb-gplus-sharePatent US5140161 - Capillary flow device
