DH

David R. Hall

HC Hcc: 1 patents #1 of 4Top 25%
SI Smith International: 1 patents #6 of 18Top 35%
📍 Provo, UT: #3 of 33 inventorsTop 10%
🗺 Utah: #33 of 504 inventorsTop 7%
Overall (1989): #29,567 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4803857 Bicycle air pump restraining device Warren J. Clark 1989-02-14
4802539 Polycrystalline diamond bearing system for a roller cone rock bit Donald G. Cross 1989-02-07