RJ

Robert M. Johnson

NG National Gypsum: 1 patents #4 of 10Top 40%
📍 San Diego, CA: #16 of 222 inventorsTop 8%
🗺 California: #320 of 6,198 inventorsTop 6%
Overall (1982): #8,451 of 81,411Top 15%
2
Patents 1982

Issued Patents 1982

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4363666 Reinforced cement sheet product containing fibers other than asbestos, clay and thickener Elmer M. Melling 1982-12-14
4344229 Flexible tree saw 1982-08-17