From the press release:
ISSYS, Inc. Awarded New Patent That Enables Microfluidic Sensors to be used with Large Diameter Pipes and High Flow Rates.
YPSILANTI, MI--(July 12, 2011) - Integrated Sensing Systems, Inc. (ISSYS) announced that the U.S. Patent Office has granted it a utility patent (US 7 823,445) “System and Method of Assessing a Property of a Flowing Fluid.”