Beijing
China
2
2023-05-04
The entities that hold a legal rights for patent applications filed by inventor Lan Li:
Li Lan from Beijing, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
Modified naphthalene series water reducing agent for concrete with high slit content, and preparation method and application thereof
#2 | 2009-06-25Determining drillstring neutral point based on hydraulic factor
3972501 ⎘