Inventor
Malcolm Gray-Stephens
Inventor
Aberdeen, GB
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
8,714,271'Multi-purpose fill and circulate well tool'2014Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2014Patents assigned to BAKER HUGHES INC (1)· patent assignee history
2014Patents assigned to GRAY-STEPHENS MALCOLM (1)· patent assignee history
2014Patents assigned to HARRIS DAVID H (1)· patent assignee history
2014Patents assigned to LEHR DOUGLAS JULIUS (1)· patent assignee history
2014Patents assigned to SONNIER GARETH D (1)· patent assignee history
2014Based in Aberdeen, GB· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES INC | 1 | 2014 |
| GRAY-STEPHENS MALCOLMself | 1 | 2014 |
| HARRIS DAVID H | 1 | 2014 |
| LEHR DOUGLAS JULIUS | 1 | 2014 |
| SONNIER GARETH D | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Aberdeen, GB | 1 | 2014 |