DH

Donald O. Hitzman

PP Phillips Petroleum: 1 patents #54 of 170Top 35%
📍 Bartlesville, OK: #44 of 129 inventorsTop 35%
🗺 Oklahoma: #151 of 749 inventorsTop 25%
Overall (1989): #119,546 of 140,708Top 85%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4798801 Production of methane by anaerobic fermentation of waste materials — 1989-01-17