DWY Sah, RB Pepinsky, PA Boriack-Sjodin… - US Patent …, 2008 - Google Patents
4,883,666 A 11, 1989 Sabel et al. 5,084.350 A 1/1992 Chang et al. 5,194,596 A* 3/1993
Tischer et al................ 530.399 5,284,761 A 2f1994 Aebischer et al. 5,350,836 A 9/1994 …