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US-11834141-B1 · Dec 5, 2023 · US
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Ma Qingfeng patents
Ma Qingfeng is listed as an inventor on 3 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Ma Qingfeng |
| Total patents | 3 |
| First publication | Aug 9, 2018 |
| Latest publication | Dec 5, 2023 |
Notable patents
Publications ranked by popularity score, then publication date.
Recent patents
Latest publications not already listed above.
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Petrochina Co Ltd | 2 |
| Univ Tianjin | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| C10M101/02 | 2 |
| C10N2030/02 | 2 |
| C10M2203/1025 | 2 |
| C10N2020/02 | 2 |
| C10G67/02 | 2 |