Power swivel and lubrication system
US-11421479-B2 · Aug 23, 2022 · US
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Walker Christopher Brian patents
Walker Christopher Brian is listed as an inventor on 8 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Walker Christopher Brian |
| Total patents | 8 |
| First publication | Nov 9, 2017 |
| Latest publication | Aug 23, 2022 |
Notable patents
Publications ranked by popularity score, then publication date.
Guidance systems and apparatus for power swivel
US-11136826-B2 · Oct 5, 2021 · US
Power swivel and gooseneck
US-10947796-B2 · Mar 16, 2021 · US
Guidance systems and apparatus for power swivel
US-2020308911-A1 · Oct 1, 2020 · US
Power swivel and gooseneck
US-2020248513-A1 · Aug 6, 2020 · US
Washpipe assemblies for a power swivel
US-10563770-B2 · Feb 18, 2020 · US
Power swivel and lubrication system
US-2018313154-A1 · Nov 1, 2018 · US
Washpipe assemblies for a power swivel
US-2017321807-A1 · Nov 9, 2017 · US
Recent patents
Latest publications not already listed above.
No data yet.
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Nat Oilwell Varco Lp | 8 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| E21B3/022 | 8 |
| E21B3/02 | 4 |
| E21B19/16 | 4 |
| E21B21/02 | 2 |
| F16J15/3284 | 2 |