XL

XUEWU LONG

Overall (2020): #219,797 of 565,922Top 40%
1
Patents 2020

Issued Patents 2020

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10837257 Rubber cylinder with rigid seal rings on both ends, packer, and bridge plug Wei Song 2020-11-17