JZ

John M. Zwiegel

GT Gray Tool: 1 patents #6 of 14Top 45%
CT Cooper Technologies: 1 patents #306 of 757Top 45%
📍 Houston, TX: #8,651 of 21,073 inventorsTop 45%
🗺 Texas: #52,441 of 125,132 inventorsTop 45%
Overall (All Time): #2,317,721 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5031696 Casing hanger and seal — 1991-07-16
4643390 Fail-safe valve actuator Michael A. Karr, Jr. 1987-02-17