Inventor
Donald H. Johnson
Inventor
Houston, TX, US
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
8,193,946'Training for directional detection'2012Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2012Patents assigned to GAO LI (1)· patent assignee history
2012Patents assigned to GARDNER WALLACE R (1)· patent assignee history
2012Patents assigned to HALLIBURTON ENERGY SERV INC (1)· patent assignee history
2012Patents assigned to JOHNSON DONALD H (1)· patent assignee history
2012Patents assigned to ROBBINS CARL A (1)· patent assignee history
2012Based in Houston, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GAO LI | 1 | 2012 |
| GARDNER WALLACE R | 1 | 2012 |
| HALLIBURTON ENERGY SERV INC | 1 | 2012 |
| JOHNSON DONALD Hself | 1 | 2012 |
| ROBBINS CARL A | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 1 | 2012 |