Sichuan
China
2
2025-01-02
The entities that hold a legal rights for patent applications filed by inventor Lin Tiejun:
Tiejun Lin from Sichuan, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
Wear-resistant and collision-resistant polycrystalline diamond compact (PDC) drill bit with rostriform teeth and plurality of blades
#2 | 2016-08-25Remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling
6444922 ⎘