HR

Harold M. Ray

TR The Doe Run: 2 patents #1 of 8Top 15%
📍 Potosi, MO: #3 of 6 inventorsTop 50%
🗺 Missouri: #8,863 of 23,789 inventorsTop 40%
Overall (All Time): #2,306,240 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5078860 Sequential and selective flotation of sulfide ores containing copper and molybdenum John C. Morrisey, IV 1992-01-07
5074994 Sequential and selective flotation of sulfide ores Nathaniel Arbiter 1991-12-24