Patent Reviews: 5,452,088; 5,452,126; 5,457,534; 5,481,356; 5,497,008; 5,497,266; 5,499,134; 5,500,524; 5,515,207; 5,515,209; 5,526,183; 5,596,433; 5,596,455; 5,596,456; 5,600,440; 5,600,441; 5,600,484; 5,601,080; 5,619,363; 5,619,377