The story of Keystone Foods is one of innovation, performance and cost competitiveness. Keystone’s Founder, Herb Lotman pioneered the mass-produced, individually quick frozen (IQF) hamburger patty and introduced the concept to the fast food industry in the late ‘60s. The industry was understandably cautious. It took time to test market the product but it quickly proved itself and was accepted as the industry standard for providing consistent quality product to the market.