Inventor
Edgar J. Liegis
Inventor
Medicine Hat, CA
Overview
Patents· 1 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
7,013,971'Reverse circulation cementing process'2006Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2006Patents assigned to HALLIBURTON ENERGY SERV INC (1)· patent assignee history
2006Based in Medicine Hat, CA· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HALLIBURTON ENERGY SERV INC | 1 | 2006 |
Locations
| Location | Patents | Span |
|---|---|---|
| Medicine Hat, CA | 1 | 2006 |