Chengdu
China
3
2024-02-15
The entities that hold a legal rights for patent applications filed by inventor Wei Yu:
Yu Wei from Chengdu, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
High-frequency composite impactor
#2 | 2023-12-05Drill string rotation controller for directional drilling
#3 | 2023-11-28Fracking tool with electromagnetic intelligent control sliding sleeve
6593608 ⎘