Robert J. Ellefsen

📍 Bethalto, IL: #19 of 48 inventorsTop 40%

🗺 Illinois: #48,934 of 84,256 inventorsTop 60%

Overall (All Time): #3,785,030 of 4,157,543Top 95%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5469722	Hasp for a cylinder lock	—	1995-11-28