A Silver Alert has been issued in Marinette County for 73-year-old Harold Patz of Dunbar, according to the Marinette County Sheriffs Office.Patz was last seen on his property on Twin Lake Road in the Town of Dunbar between 2 and 2:30 p.m. Sunday, July 12. Authorities said his ATV was found on the property near a small lake. Extensive searches of the property and lake were conducted, but Patz remains missing.Patz was last seen wearing shorts, tennis shoes and possibly a black weighted exercise vest.Anyone with information is asked to contact the Marinette County Sheriffs Office at 715-732-7627. ...read more read less