EH

E. Webb Henderson

PP Phillips Petroleum: 2 patents #22 of 170Top 15%
📍 Bartlesville, OK: #21 of 129 inventorsTop 20%
🗺 Oklahoma: #43 of 749 inventorsTop 6%
Overall (1989): #28,677 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4824643 Apparatus for producing carbon black Mark L. Gravley 1989-04-25
4822588 Process for producing carbon black Mark L. Gravley 1989-04-18