Nanogen, Inc., developer of molecular and point-of-care diagnostic products, announced today that it was issued U.S. Patent No. 6,780,584, "Electronic Systems and Component Devices for Macroscopic and Microscopic Molecular Biological Reactions, Analyses and Diagnostics," by the U.S. Patent and Trademark Office. The '584 patent covers the design, development, and capability of an electronic system to carry out and control multi-step and multiplex reactions in macroscopic or microscopic formats. The system described in the patent is at the core of Nanogen's electronic microarray technology, which uses electricity to move and concentrate biological samples in miniature formats for diagnostic applications.