ET

Edward E. Tefka

📍 Northfield, IL: #59 of 110 inventorsTop 55%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #4,021,034 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4539555 Fire and smoke protection device for use in buildings — 1985-09-03