Slot machines and other devices are arranged to interact with the...http://www.google.com/patents/US7878896?utm_source=gb-gplus-sharePatent US7878896 - Gaming token having a variable valueAdvanced Patent SearchPublication numberUS7878896 B2Publication typeGrantApplication numberUS 11/321,793Publication dateFeb 1, 2011Filing dateDec 29, 2005Priority dateMay 10, 2000Fee statusLapsedAlso published as