| http://www.w3.org/ns/prov#value | - Patent US6247643 - Gaming machine system operable with general purpose charge cards - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsIn a gaming establishment, a player feeds a general purpose charge card such as a VISA, MasterCard or AMERICAN EXPRESS card to a reader at a gaming machine or enters on a keyboard or other input device, infor
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