RR Tomasino, G McKinnon - US Patent 6,126,999, 2000 - Google Patents
3,661,622 5/1972 Rogers...................................... 117/75 3.684, 758 8/1972 Honig et al....
260/29.6 4.013, 614 3/1977 Self........................................... 260/40 4,282,123 8/1981 …