Patents.
Re. 29,963; 3,920,311; 3,925,910; 3,926,505; 3,930,718; 3,930,732; 3,932,023; 3,941,458; 3,951,513; 3,953,129; 3,954,322; 3,957,346; 3,953,727; 3,954,323; 3,957,348; 3,960,440; 3,961,836; 4,073,566; 4,094,575; 4,094,576; 4,094,577; 4,104,489; 4,148,295; 4,148,574; 4,148,584; 4,148,585; 4,149,073; 4,149,686; 4,150,876; 4,153,224; 4,153,821; 4,155,007; 4,155,094; 4,155,096; 4,155,649; 4,160,598; 4,160,601; 4,160,907; 4,160,913; 4,161,349; 4,161,547; 4,161,752; 4,162,121; 4,162,122; 4,162,481; 4,162,482; 4,162,509; 4,163,370;