ALEXANDRIA, Va., March 10 -- 3M Innovative Properties, St. Paul, Minnesota, has been assigned a patent (9,908,772) developed by five co-inventors for "nanostructured articles and methods of making nanostructured articles." The co-inventors are Moses M. David, Woodbury, Minnesota, Andrew K. Hartzell, Hudson, Wisconsin, Timothy J. Hebrink, Scandia, Minnesota, Ta-Hua Yu, Woodbury, Minnesota, and Jun-Ying Zhang, Woodbury, Minnesota. The abstract states: "A nanostructured article comprises a matrix a . . .