Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12371608 | Suspended sand dragging fibers and preparation methods thereof | Jianchun Guo, Shan Ren, Bin Liu, Yuxuan Liu, Yang Lu +9 more | 2025-07-29 |
| 12234309 | High-temperature-resistant deep penetration molecular membrane acid copolymers and preparation methods thereof | Jianchun Guo, Bin Liu, Bo Gou, Shan Ren, Yang Lu +6 more | 2025-02-25 |
| 12227696 | Instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof | Jianchun Guo, Shan Ren, Cong Lu, Bin Liu, Huifei Mao +5 more | 2025-02-18 |
| 11845896 | Structural stabilizer for fiber and conventional proppant complex in efficient proppant migration and placement technology of fractured well and preparation method | Jianchun Guo, Shan Ren, Hao Yang, Yingxian Ma, Kun Wang +11 more | 2023-12-19 |
| 11146162 | Control method and control circuit for switch in switching power supply | Le Li, Zhiliang Hu, Yongjiang Bai | 2021-10-12 |
| 10897204 | Control method and control circuit for improving dynamic response of switching power supply | Yongjiang Bai, Zhiliang Hu, Qiukai Huang | 2021-01-19 |
| 9979292 | Control method and control circuit for switch in switching power supply | Le Li, Zhiliang Hu, Yongjiang Bai | 2018-05-22 |
| 9966856 | Control method and control circuit for improving dynamic response of switching power supply | Yongjiang Bai, Zhiliang Hu, Qiukai Huang | 2018-05-08 |
| 9906140 | Power supply circuit and power supply method for switching power supply | Zhiliang Hu, Yongjiang Bai, Jin Jin | 2018-02-27 |
| 9825538 | Voltage sampling control method and related control circuit for isolated switching power supply | Zhiliang Hu, Yongjiang Bai | 2017-11-21 |
| 9762128 | Control circuit of isolated converter and switching power supply, and control method for the same | Yongjiang Bai, Zhiliang Hu, Le Li, Jinping Dong | 2017-09-12 |
| 8610660 | Light emitting diode backlight driving circuit | Ming Xu | 2013-12-17 |
| 8587206 | LED power supply device | Juanjuan Sun, Xiang Li | 2013-11-19 |
| 6713710 | Apparatus and method for trackless movement and full penetration arc welding | — | 2004-03-30 |
| 6437281 | Apparatus, system, and related method for sensing a characteristic of a workpiece in an automated process | Yuming Zhang, Pengjiu Li | 2002-08-20 |
| 5990446 | Method of arc welding using dual serial opposed torches | Yuming Zhang | 1999-11-23 |