David Russell Berg, of Louisville, Kentucky, 90, passed away peacefully at Baptist East Hospital on September 16, 2012. He spent his last moments with his wife and family. David was born in South Ashburnham, Mass. on January 29, 1922 of Emil and Ellen Berg. Of Swedish descent, he visited Sweden often as a child and later in his life and prided himself on his Swedish heritage. He met his wife Evelyn in Erie, Pa. when they were high school sweethearts at Academy High; double dating with life-long friends, Phyllis and Neal Fourspring, in a 1930's Ford - rumble seat, 25 cent gas and strains of "their song" Deep Purple. In 1956, he moved with his wife, son and daughter to Louisville as part of General Electric's build up of Appliance Park. Starting with GE as a mechanical engineer, David held several positions in refrigeration and room air conditioning, including product engineer, manager of structural engineering and manager of product design. Like his father, Emil, David had a special gift for inventing and is remembered by his friends and colleagues alike as the main inventor of General Electric's famous Carry-Cool air conditioner. Throughout his career, David mentored several young engineers who went on with their own successful careers. Over the years, some of them have come back to David to tell him of his major influence on them. David is survived by his loving family: his devoted wife Evelyn Schaaf Berg of 66 years, his son James (Joanne), and his daughter Jane Ratterman (Tom); four grandchildren: David and Lauren Berg, and Chris and Dan Ratterman; his sister in law Elizabeth Schaaf of Erie, and several nieces and nephews, including Paula Berg, Larry Schaaf, Dan Schaaf and Renee Seyboldt, all of Erie. David was a deeply loving man known for his sense of humor, his abiding faith, his commitment to volunteerism, love of country, and appreciation of "fine wines". Above all, he was devoted to his family and followed their activities, involving himself actively in their lives. The funeral Mass was held at 10:00 a.m., Thursday, September 20, 2012 at Saint Margaret Mary Catholic Church in Louisville, Ky. with burial in Calvary Cemetery. A visitation was held on Wednesday, September 19th at Pearson-Ratterman Brothers Funeral Home.