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<http://webisa.webdatacommons.org/378740100>	<http://www.w3.org/ns/prov#value>	"Patent US6722985 - Universal player tracking system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsA disclosed player tracking unit utilizes a memory arranged to store a plurality of different communication protocols allowing the player tracking unit to communicate with a plurality of different types of gaming machines and a plurality of" .