DJ

Dwight E. Johnson

UG United States Gypsum: 1 patents #247 of 432Top 60%
📍 Villa Park, IL: #142 of 246 inventorsTop 60%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #3,992,245 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4576620 Apparatus for the production of mineral fibers having supplemental collection chamber exhaust William F. Porter, Michael J. Porter 1986-03-18