<http://webisa.webdatacommons.org/prov/272935005>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/201018447> .
<http://webisa.webdatacommons.org/201018447>	<http://www.w3.org/ns/prov#value>	"This invention relates generally to methods and devices for reading and writing data on a disk and more particularly to reading and writing data on a disk with constant density recording and a headerless architecture." .
<http://webisa.webdatacommons.org/201018447>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/201018447>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .