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<http://webisa.webdatacommons.org/prov/223832008>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/312506672> .
<http://webisa.webdatacommons.org/312506672>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<arizona.edu> .
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<http://webisa.webdatacommons.org/312506672>	<http://www.w3.org/ns/prov#value>	"J. Cheung, and H. Xin, Electrical Generator with Ferrofluid Bearings\", US Patent No. 6,812,583, November 2 nd , 2004. (also in several other countries including China and Mexico )" .