US Patent Issued on March 25 for "Adjustable firmness mattress system" (Minnesota, New York, Louisiana Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,256,845, issued on March 25.

"Adjustable firmness mattress system" was invented by Philip J Haarstad (Chanhassen, Minn.), Molly Haarstad (Natchitoches, La.), Alexander Haarstad (Natchitoches, La.), Benjamin Haarstad (Chaska, Minn.), Connie Marie Haarstad (Eden Prairie, Minn.), Donald Melvin Haarstad (Champlin, Minn.), Laura K Y Haarstad (Chanhassen, Minn.), Lucas G Haarstad (Chanhassen, Minn.), Paul A Haarstad (Eden Prairie, Minn.), Dennis Nathaniel Harvey (Norwood Young America, Minn.), Anthony Todd Hessburg (Minnetrista, Minn.), Ching Hung (Maple Grove, Minn.), Heidi J Hung (Maple Grove, Minn.), Shawn M Patterson (East Aurora, N.Y.), Elizabeth Kate Radzwill (White Bear Lake, Minn.)...