DC

Douglas G. Calvin

KI Keystone International: 1 patents #6 of 8Top 75%
📍 Houston, TX: #210 of 924 inventorsTop 25%
🗺 Texas: #885 of 4,134 inventorsTop 25%
Overall (1989): #119,904 of 140,708Top 90%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4846441 Methods and apparatus for adjusting a valve closure member William B. Scobie 1989-07-11