Inventor
David McMahon
Inventor
Houston, TX, US
Overview
Patents· 3 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling60%
F15BSystems acting by means of fluids in general20%
H02HEmergency protective circuit arrangements20%
PatentTitleYear
10,156,095Top drive and power swivel with high pressure seals and automatic refilling lubrication reservoir20189,695,685'Systems and methods for detecting and communicating failure of integral surge suppression in drive systems for downhole equipment'20176,957,703'Closure mechanism with integrated actuator for subsurface valves'2005Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2005–2017Patents assigned to BAKER HUGHES INC (2)· patent assignee history
2005Based in Broken Arrow, OK, US· patent location history
2017Based in Foxfield, CO, US· patent location history
2018Patents assigned to KEAST LARRY G (1)· patent assignee history
2018Patents assigned to MCMAHON DAVID A (1)· patent assignee history
2018Based in Houston, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES INC | 2 | 2005–2017 |
| KEAST LARRY G | 1 | 2018 |
| MCMAHON DAVID Aself | 1 | 2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 1 | 2018 |
| Foxfield, CO, US | 1 | 2017 |
| Broken Arrow, OK, US | 1 | 2005 |