J Broughton, KJ McPartlan, E Rodgers… - US Patent …, 2007 - Google Patents
US PATENT DOCUMENTS 6,850,599 B2 2/2005 Yoshitani..................... 379, 37 6,850,613
B2* 2/2005 McPartlan et al...... 379,265.02 5,613,068 A 3/1997 Gregg et al. 6,868,059 B1 …