ALEXANDRIA, Va., Aug. 29 -- 3M Innovative Properties, St. Paul, Minnesota, has been assigned a patent (8,815,325) developed by seven co-inventors for a medicinal inhalation device. The co-inventors are Moses M. David, Woodbury, Minnesota, Daniel R. Hanson, New Richmond, Wisconsin, Philip A. Jinks, Loughborough, United Kingdom, Christopher G. Blatchford, Loughborough, United Kingdom, Vicki M. Lietzau, Hutchinson, Minnesota, Jean A. Kelly, Woodbury, Minnesota, and Suresh Iyer, Woodbury, Minnesota. . . .