[1]Patent:US2006/9643,2006,A1,.Locationinpatent:Page/Pagecolumn5
[1]Patent:US2005/148649,2005,A1.Locationinpatent:Page/Pagecolumn22
[1]Patent:US2006/9643,2006,A1.Locationinpatent:Page/Pagecolumn5
[1]Patent:US5457104,1995,A
[1]Patent:US4952601,1990,A
[2]Patent:US5082971,1992,A
[1]Patent:US4725607,1988,A