RR Friedlander, RA Hennessy, JR Kraemer - US Patent 7,792,774, 2010 - Google Patents
5,455,868 A 10/1995 sergentet 91- 7,181,428 B2* 2/2007 Lawrence.................... 705/38
5,491,838 A 2/1996 Takahisa 7,213,009 B2 5/2007 Pestotnik et a1. 5,524,051 A 6/1996 …