R Whelan, L Van Wagenen, R Morris - US Patent 7,606,242, 2009 - Google Patents
5,241,598 A 8/1993 Raith well. The 1nvent1on may enforce a number of assoc1at1on
5,586,304 A 12/1996 Stupek, Jr 'et a1 ' policies such as, for example, forcing the mobile unit …