Hydraulic control apparatus and method for a downhole tool
US-12435585-B1 · Oct 7, 2025 · US
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Mada Hems patents
Mada Hems is listed as an inventor on 1 patent in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Mada Hems |
| Total patents | 1 |
| First publication | Oct 7, 2025 |
| Latest publication | Oct 7, 2025 |
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Cnpc Usa Corp | 1 |
| Beijing Huamei Inc | 1 |
| China Nat Petroleum Corp | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| E21B10/322 | 1 |
| E21B23/006 | 1 |