C Kyrtsos, TE Pilutti, EM Lavoie - US Patent 9,315,212, 2016 - Google Patents
3,542,390 A 11/1970 Fikes et al. 3,605,088 A 9, 1971 Savelli 3,787,077 A 1/1974 Sanders
3,833,928 A 9, 1974 Gavit et al. 3,860,257 A 1/1975 Mesley 4,040,006 A 8, 1977 Kimmel …