Fluidigm of South San Francisco, Calif., has received US Patent No. 7,666,361, "Microfluidic devices and methods of using same." The patent claims elastomeric-based microfluidic devices and methods for manufacturing and using them. Some of the devices have arrays of reaction sites to support high-throughput analyses, according to the patent. Some devices also include reaction sites located at the end of blind channels where reagents have been previously deposited during manufacture. The reagents become suspended once sample is introduced into the reaction site.