About: http://webisa.webdatacommons.org/37692392

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In a preferred embodiment of the present invention the means for holding the plates together is a magnetic force provided by permanent magnets.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com