C Liu, MW Tang, R Serbayeva, L Zhou - US Patent 8,127,936, 2012 - Google Patents
3,133,132 A 5, 1964 Loeb et al. 4,230,463 A 10, 1980 Henis et al. 4,717.393 A 1/1988
Hayes 4,855,048 A 8/1989 Tang et al. 4,877,528 A 10, 1989 Friesen et al. 5,409,524 A …