JZ

Jiafu Zhang

TC Tong Oil Tools Co.: 1 patents #4 of 7Top 60%
Overall (All Time): #3,188,750 of 4,157,543Top 80%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
8607856 Cable head for petroleum logging Guoan Zhang, Jianlong Cheng 2013-12-17