FH

Frederick Alan Hoffstadt

CA Calgon: 1 patents #90 of 151Top 60%
Overall (All Time): #4,091,117 of 4,157,543Top 100%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4272364 Frother for coal flotation Kenneth W. Dixon 1981-06-09