JZ

John (Youhe) Zhang

SI Smith International: 1 patents #21 of 56Top 40%
📍 Tomball, TX: #14 of 45 inventorsTop 35%
🗺 Texas: #2,374 of 8,731 inventorsTop 30%
Overall (2004): #185,466 of 270,089Top 70%
1
Patents 2004

Issued Patents 2004

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6698538 Drill bit having adjustable total flow area Steffen S. Kristiansen, Michael G. Azar 2004-03-02