About: http://webisa.webdatacommons.org/142906426

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	All of these patents disclose various apparatus and methods wherein a microprocessor based controller downhole is actuated by a surface or other external signal such that the microprocessor executes a control signal which is
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com