Assignee
ARMSTRONG ERNEST E
3 granted patents·47 citations·filing 1976–1978
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0159US4333530AMethod and apparatus for cementing a casingARMSTRONG ERNEST E·Filed 1978·Granted Jun 8, 1982·26 cites·19 claims
- 0238US4105074ACementing staging toolARMSTRONG ERNEST E·Filed 1976·Granted Aug 8, 1978·12 cites·18 claims
- 0334US4151881AApparatus for completing a wellARMSTRONG ERNEST E·Filed 1977·Granted May 1, 1979·9 cites·8 claims
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