U.S. Patents Awarded to Inventors in Wisconsin (Feb. 20)
ALEXANDRIA, Va., Feb. 20 -- The following federal patents were awarded to inventors in Wisconsin.
3M Innovative Properties Assigned Patent for Method of Making Optical Films, Stacks
ALEXANDRIA, Va., Feb. 20 -- 3M Innovative Properties, St. Paul, Minnesota, has been assigned a patent (No. 10,921,594, initially filed May 23, 2018) developed by four co-inventors for a "method of making optical films and stacks." The co-inventors are Gregg A. Ambur, River Falls, Wisconsin, Timo...