Comment Comment by dwynings Patents are referenced here: https://docs.google.com/viewer?url=http://online.wsj.com/pub...U.S. PATENT NO. 6,263,507 U.S. PATENT NO. 6,757,682 U.S. PATENT NO. 6,788,314 U.S. PATENT NO. 6,034,652 parent dwynings 16 years ago
U.S. PATENT NO. 6,263,507 U.S. PATENT NO. 6,757,682 U.S. PATENT NO. 6,788,314 U.S. PATENT NO. 6,034,652