Inventor
LIMING FAN
Inventor
CN
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling33%
H02JElectric power networks17%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems17%
H04LTransmission of digital information, e.g. telegraphic communication17%
H04NPictorial communication, e.g. television17%
PatentTitleYear
12,199,448System and method for dynamically adjusting coupling coefficients of non-contact transmission magnetic mechanism202511,946,374Omni-directional horizontally orientaed deflecting tool for coiled tubing202411,732,551Fully electrically controlled intelligent subsurface safety valve202311,284,126Method and system for streaming media live broadcast2022Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2022Patents assigned to SZ DJI TECHNOLOGY CO LTD (1)· patent assignee history
2022–2025Based in CN· patent location history
2023–2024Patents assigned to UNIV SOUTHWEST PETROLEUM (2)· patent assignee history
2025Patents assigned to CHINA NAT PETROLEUM CORP (1)· patent assignee history
2025Patents assigned to CNPC CHUANQING DRILLING ENG CO (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| UNIV SOUTHWEST PETROLEUM | 2 | 2023–2024 |
| CHINA NAT PETROLEUM CORP | 1 | 2025 |
| CNPC CHUANQING DRILLING ENG CO | 1 | 2025 |
| SZ DJI TECHNOLOGY CO LTD | 1 | 2022 |
Locations
| Location | Patents | Span |
|---|---|---|
| CN | 4 | 2022–2025 |