Assignee

DERBY MICHAEL

US·1 granted patent·4 citations·filing 2010–2010

Technology mixE21B1

Top patents by PatentIndex Score

1 record

0161US8695697B2Downhole tool having setting valve for packing elementDERBY MICHAEL·Filed 2010·Granted Apr 15, 2014·4 cites·50 claims

Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →