U.S. Patent No. 6,354,491
U.S. Patent No. 6,354,491 - Issued on January 16, 2002, this patent addresses authorizing the debiting of funds from bank accounts without the requirement of negotiating a paper check and relates to existing United States Patent Nos. 5,484,988, 6,164,528 and 6,283,366, all of which address electronic check transactions.



